Solutions for Seeleys Anatomy And Physiology 11th Us Edition by Vanputte

Page 1


EleventhEdition

EricWise

SantaBarbaraCityCollege

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TABLEOFCONTENTS

INTRODUCTION

Thisinstructor'sresourcemanualwaswrittentoassistyouinthepreparationofthelabportionofthecourse.It servestocoordinatethelabswiththeorderingofmaterial,aidtheinstructororlabtechnicianinpreparingmaterial forthelab,provideadetailedlistofpreparationsandsourcesfororderingandinstructionalaidsintherunningofthe lab.Thismanualalsoprovidesanswerstothereviewquestionsatthebackofeachexercise.

Thelabmanualcontains43exercisesthatcoverthebreadthofhumananatomyandphysiology.Eachexercisecan beusedinitsentiretyorshorteneddependingonthetimeavailableoraccordingtoyourinterest.Labsvaryinterms ofequipment.Someexercisesmayneedtobemodifiedordeletedentirelyduetothephysicalconstraintsofthe institution.Thetextiswrittenforstudentswhoareintroductorystudentstothematerialandmayhavelittleorno chemistrybackground.

Ordersmustbemadeaheadoftimeforitemssuchassterilizedblood,livefrogs,enzymes,andothermaterialsfor thepreparationofsolutions.Manysupplycompanieswilltakeordersearlyandshipmaterialtoarriveatthe scheduledtime.Aslabsarebeingprepared,specificquantitiesofmaterialsneedtobeprepared.Ageneralruleof thumbistocalculatethetotalamountofmaterialthatwillbeusedinlabanddoublethatamount.

Materialslistedinthislabmanualaregenerallyindicatedasperstudent,pertable(assumingatableof4),orperlab section(25students).Testallreagentsandexperimentspriortotryingtheminlab.Noteanymodificationstothe experimentsforfutureuse.Iwouldbeveryhappytohearfromyourregardingcommentsorsuggestionsconcerning thelab.YoucancontactmethroughMcGraw-HilloratSantaBarbaraCityCollege.

Instructor'sresourcessuchasPowerPointreviewsattheendoflab,videos,computerpresentations,additionaltexts orillustrationsaddtostudents’comprehensionofthematerial.Somestudentswanttogobeyondthematerialat handandavailablereferencesarewonderfultohaveinthelab.

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SAFETYINTHELAB

Safetyinthelabisoneoftheprimaryconcernsofanyinstructorteachinganatomyandphysiology.Safety guidelinesareprintedinthelabmanualandshouldbethoroughlycoveredbytheinstructorpriortobeginningthe lab.Severalpotentialhazardsoccurinthelabincluding:

1.Sharpobjectssuchasbrokenglassware,razorblades,scalpelbladesandotherpotentiallydangerouscutting orpuncturingobjects.Properdisposalofsharpobjectsisessentialasisthehandlingoftheseobjects.

2.Infectiousdiseases-studentsshouldwearbarrierglovesandprotectiveeyewearwhenhandlingbodily fluids.Studentsshouldhandleonlytheirownfluidsunlesscloselysupervisedbytheinstructororother qualifiedpersonnel.Studentsneedtobepreparedtoworkwithinfectiousagents.Thosestudentsentering thehealthprofessionwillpotentiallyencounterlethaldiseasesintheirprofessionandanearlyprotocolthat influencessafetyshouldconstantlybestressed.Evenifyouknowmaterialisnon-pathogenic,students shouldtreatitasifitis.Materialthathascomeintocontactwithbodilyfluidsmustbeplacedina10% bleachsolutionordepositedinasharpscontainer.

3.Disposalofanimalwastes–Properdisposalofanimalwasteiscritical.Ifyourinstitutiondoesnothavean incineratoryoushouldcheckwithuniversitiesnearbyoranimalcontrolfacilities.Materialpreservedwith formaldehydeshouldnotbedisposedofinlocallandfills.

4.Flamesorhotsurfaces-Mostoftheexperimentsrequiringheatingintheseexercisescanbedoneusinghot plates.Itisimportanttouseheat-proofglasswareonthehotplates.Glassfingerbowlsandhouseholdjars arenotheatproofandshouldnotbeheatedonhotplates.

5.Toxicmaterials-Someofthematerialinlabistoxic.Studentsshouldnoteatfoodinlabandmakesure theywashtheirhandsafterhandlingmaterialinlab.Spillsmustbecleaned-upimmediately.Allreagents usedinlabthatarepotentiallydangerousshouldhaveamanufacturer’ssafetydatasheet(MSDS)thatcan beconsultedifspillsoccur.

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CORRELATIONS

ThislabmanualwaswritteninconjunctionwithSeeley’sAnatomyandPhysiology,11thedition.Ihaveprovided correlationsbetweentheLecturetextandtheLabManual,yetthelabmanualcanbeusedwithanystandardcollege anatomyandphysiologytext.

ChaptersinSeeley’sAnatomyandPhysiology,11th edition,byVanPutte,etal.

1TheHumanOrganism

2TheChemicalBasisofLife

3StructureandFunctionoftheCell

4Histology:TheStudyofTissues

CorrespondingExercisesinAnatomyandPhysiology LaboratoryManual,byEricWise

1IntroductiontoLabScience,Chemistry,Organs, Systems,andOrganizationoftheBody

1IntroductiontoLabScience,Chemistry,Organs, Systems,andOrganizationoftheBody

2Microscopy

3CellStructureandFunction

4Tissues

5IntegumentarySystem 5IntegumentarySystem

6SkeletalSystem:BonesandBoneTissue 6IntroductiontotheSkeletalSystem

7SkeletalSystem:GrossAnatomy

7AppendicularSkeleton 8AxialSkeleton:Vertebrae,Ribs,Sternum, Hyoid 9AxialSkeleton-Skull

8ArticulationsandMovement 10Articulations

9MuscularSystem:HistologyandPhysiology 11MusclePhysiology

10MuscularSystem:GrossAnatomy

11FunctionalOrganizationofNervousTissue

12SpinalCordandSpinalNerves

13BrainandCranialNerves

14IntegrationofNervousSystemFunctions

15TheSpecialSenses

16AutonomicNervousSystem

12OverviewofMusclesand MusclesoftheShoulderandUpperExtremity 13MusclesoftheHip,Thigh,LegandFoot 14MusclesoftheHeadandNeck 15MusclesoftheTorso

16IntroductiontotheNervousSystem 19NervousSystemPhysiology-Stimuliand Reflexes

18SpinalCordandSomaticNerves

17BrainandCranialNerves

19NervousSystemPhysiology-Stimuliand Reflexes

20IntroductiontoSensoryReceptors

21TasteandSmell

22EyeandVision

23Ear,Hearing,andBalance

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17FunctionalOrganizationoftheEndocrine System

18EndocrineGlands

19CardiovascularSystem:Blood

20CardiovascularSystem:TheHeart

30IntroductiontoBloodVesselsandArteriesof theUpperBody

21CardiovascularSystem:PeripheralCirculation andRegulation

22LymphaticSystemandImmunity

EXERCISE1 IntroductiontoLabScience,Chemistry,Organs,Systems, andOrganizationoftheBody

INTRODUCTION

Thislabintroducesthestudenttothefieldsofanatomyandphysiology,discussesscienceasageneralfieldofstudy, andprovidesaverybasicintroductiontochemistry.The"scientificmethod"isadescriptionofabroadnumberof proceduresandexperimentaltechniques.Thegoalsofvalidsciencehavecriteriaofexperimentalrepeatabilityand priorpublicationrightsthatarefollowedbymembersofthescientificcommunity.

Termssuchashypothesis,controlgroup,experimentalgroup,theory,andlawcanhelpstudentsdistinguishthe specificparametersofscientificstudyfromwhatiscommonlyperceivedassciencebythelayperson.Another importantareafordiscussionisthetopicofhonestyinscience.Courtcasesinvolvinginterpretationofdataby"paid consultants"hasblurredtheobjectivityofthescientificexperienceyetgooddiscussionscanbehadbyopening-up thetopicofhonestyinthecommercialdevelopmentofnewdrugsandtheneedforhonestappraisalofone'swork whentheeffortsofscienceareusedforpurposesthatconcernthehealthorwell-beingofpeople.

Anotherpartofthelabistointroducethestudenttotheideaofdatacollection,workingwithdata,graphingresults andinterpretingthedatainaverysimpleformat.Somestudentswillhavenodifficultywiththenumericalportion oftheexercisewhileothersmayfeelfrustrated.Itisagoodtimetomakeanearlyevaluationofstudents' relationshipstomathandthepotentialneedforanaugmentationoftheireffortsinmath.Someanatomyand physiologycourseshavechemistryasaprerequisiteandsomedonot.Thislabexerciseinvolvessomebasicand fundamentalconceptsofchemistrybutisnotmeanttocovereventheessentialsofchemistryneededforthecourse. Agoodreferencetothestudyofchemistryisimportantforthosestudentswhohavehadnochemistrybackground.

WhendiscussingtheatomicleveloforganizationhavingavailableMRIgraphicsfromlocalhospitalsorphysicians allowsstudentstoexaminetheimportanceofanatomicstudyfromvariousperspectivesandtechnologies.Itisalso importanttocomparedirectionaltermsforquadrupedswiththoseforhumansassuperiorandinferiorarespecific termsforhumans.Thetermsanterior/ventralandposterior/dorsalaresynonymousinhumanswhiletheanterior endofaquadrupedistowardthenosewhilethedorsalsideisalongthevertebralcolumn.

Planesofsectioningarealsoimportantconceptsinthestudyofanatomy.Illustrationsoforgansthathavebeen sectionedorthinsectionsoforgansembeddedinplasticmakegoodtoolsfordiscussingsectioningplanes.Likewise theuseoftorsomodelsforthediscussionofbodycavitiesprovidesagoodvisualmediumfordemonstration.

Moststudentshaveanintuitivesenseandsomefamiliaritywiththeregionsofthebody.Particularnoticeshouldbe giventospecificanatomictermssuchas"arm"(fromtheshouldertotheelbow)and"leg"(fromthekneetothe ankle).Descriptionsoftheabdominalregionareusuallyeasilyunderstood.Theterm"hypochondriac"comesfrom theGreekwordsmeaning"underthecartilage".Inearliertimesthehypochondriacareawasthoughttobethe centerofmelancholy.

TIME1.5-2hours

Acid/Base

Safetygogglesandgloves

Five10mLtesttubes

Testtuberack

10mLgraduatedcylinder

Permanentmarker

Distilledwaterindropperbottle

0.1MHClindropperbottle

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0.1MNaOHindropperbottle

Bakingsoda(sodiumbicarbonate)

Sodiumchloride(tablesalt)

Wide-rangingpHpaper(pH1-14)

Parafilm®

Smallmetalspatula

Balanceandweighpaper

IonicandCovalentMolecules

18gaugewire

Alligatorclips

9voltbattery

6voltflashlightbulb

Miniaturescrewlampreceptacle(Carolina#756481orSargentWelch#CP33008-00)

Two50mLbeakers

15%sucrosesolutionindropperbottle

15%sodiumchloridesolutionindropperbottle

HydrogenBonds

Graduatedcylinder

Two50mLbeakers

Smallbottleofdistilledwater

Smallbottleofethanol(70%orgreater)

Hotplate(donotuseopenflame)

HeartRateandExercise

Clockorwatchwithaccuracyinseconds

Calculator

OrganSystemsSection

ModelsofHumanTorso

ChartsofHumanTorso

ANSWERSTOIN-TEXTQUESTIONS

Page2

1centigram 1kilosecond 1decameter 1nanoliter

4.3X106

3.4X10-5

2.2X103 1.9X10-3

Figure1.8 1.Respiratory 2.Urinary 3.Nervous 4.Muscular 5.Reproductive(female) 6.Skeletal

7.Lymphatic

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8.Integumentary 9.Digestive 10.Endocrine 11.Cardiovascular

Page14

Findthefollowinglocationsonyourbodyandprovidetheappropriateanatomicaldescriptionfortheseregions. Shin Crural Elbow Cubital Neck Cervical Toes Digital Shoulder Acromial Thigh Femoral Kneecap Patellar

REVIEWANSWERS

1.Intermsofbaseunits

a.Themeteristhebaseunitoflengthinthemetricsystem.

b.Theliteristhebaseunitofvolumeinthemetricsystem?

2.Cubiccentimetersandmillilitersareinterchangeable,thereforethereare200cubic centimetersin200mL

3.Thereare1000mginonegramsotherewouldbe0.35gramsofmedicationin350mg.

4.3.45X10-4litersis0.000345literinscientificnotation.

5.Thereare4,500,000milligramsin4.5kilograms.

6.0.25meters

7.Ifgivenalengthof1/10,000ofameter

a.0.0001

b.1X10-4

8.Useawordtodescribe

a.Amillisecondisone-thousandthofasecond:

b.Akiloliterisone-thousandliters:

c.Acentimeterisone-hundredthofameter:

9.Determinedbyexperimentation.Heartrategenerallyincreaseswithexerciseuptoacertainpoint.Thereisa maximumheartratesothetrendwouldnotcontinue.

10.Inthiscase,exerciseistheindependentvariableandheartrateisthedependentvariable.

11.Determinedbyexperimentation

12.AchemicalthatdampensthechangeinpHwhenacidorbaseisaddedtosolution

13.7istheneutralpH

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14.ApHof8ismorebasicthanapHof6

15.Thehydrogenionconcentrationincreases

16.Solutionswithmoreelectrolytesconductelectricitymoreeasilythansolutionsofpurewater.

17.Covalentbonds

18.Hydrogenbondsareweakbonds

19.physiology

20.organsystems

21.anatomicalposition

22.abdominalcavity

23.thoraciccavity

24.pelviccavity

25.a.shoulderandelbow

26.b.kneeandankle

27.c.organelle

28.epigastricandrighthypochondriac

29.superior

30.distal

31.deep

32.anterior/ventral

33.respiratory

34.digestive

35.muscular

36.d.dorsal

37.Theabdomenistheregionofthebellyandtheabdominalcavityisaspaceintheabdominalregion.

38. a.cervical b.acromial c.pectoral d.axillary e.brachial f.abdominal

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g.antebrachial h.carpal

i.genital j.femoral k.crural

l.pedal

m.cephalic n.frontal

o.sternal p.coxal

39. a.midsagittal(median)

b.transverse

c.frontal

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EXERCISE2 Microscopy

INTRODUCTION

Microscopyandbeginningstudentsareaninterestingcombination.Inanyintroductoryscienceclassthereare usuallystudentswhohavehadnoexperiencewithmicroscopes,thosewhohavehadsomeexperience(butithas beenlimited,orwithothertypesofmicroscopesthanthosefoundinthisparticularlab),andstudentswithquiteabit ofmicroscopeexperience.Anotherinterestingfactoristhegreatreluctanceonthepartofmanystudentstoadmit thattheydonotknowhowtouseamicroscope(ordonotknowhowtouseitcorrectly).

Itisworththeefforttodoademonstrationofthemicroscopebeforelettingstudentsusetheinstruments.Frequently whentheyhaveamicroscopeattheirdesksandyouaredemonstrating,theypaynoattentiontoyoubutfiddlewith themechanismsinfrontofthem.Oncetheyhavebeenshownthemicroscopeandlearnthepartsthentheyseemto haveaneasiertimewiththeexercise.

DiscussionsaboutcareofthemicroscopevaryfrominstructortoinstructorbutIthinkthatyoucannotassumethat yourstudentswillknowanythingaboutmicroscopecareunlessyouprovidethemwithspecificguidelines.Someof thesearelistedinthisexercise.Likewisetheknowledgeofthepartsofthemicroscopeisimportant.Studentswho knowthestructureofthemicroscopewillhaveagoodunderstandingofthefunctionsoftheparts.Microscope modelsvarybymanufacturersoyoumaywishtoprovidestudentswithalabeledillustrationofthemicroscopesin yourparticularlab.

TounderstandthefieldofviewIliketohavestudentsmeasureitdirectlyunderlowpower.Clearplasticmetric rulersworkwell.Youcanalsotakestandardmetricrulersandplaceseveralofthemonaphotocopymachineand runapieceofoverheadtransparencyacetatethroughthemachine.Cuttheacetatesheetsintosmall(10-15cm) sections.Studentscanplacethethinstripsofacetateontheirmicroscopestages,examinethemunderlowpower anddirectlymeasurethefieldofview.

Oncetheyhaveobtainedthisvaluetheycanswitchtothenexthigherobjectivelensandmaketheircountto determinethediameterofthefieldofview.Thediameterdecreasesininverseproportiontothemagnificationofthe lens.Thusifthediameteris4mmat40Xthenthediameterwillbe0.4ofthat(or1.6mm)at100X.The magnificationof100Xis2.5timesgreaterthan40Xsothefieldofviewis2.5timessmaller.

Whenworkingwithstudentsinlabitisgoodtohavethemgetstartedontheirmicroscopeworkthenwalkaround theroomtoseeifthestudentshaveputthemicroscopeslidesonthestagecorrectly.Determineiftheyknowhowto adjustthelight,movetheslidearound,focuscorrectly,etc.Sometimesstudentswillnotaskforhelpbutitis apparentfromalittleobservationthattheyneedit.OnequickmethodthatIhaveusedinlabistowalkaroundthe labasstudentsjuststarttoexaminetheirfirstslide.Ifthetipofthehighpowerobjectivelensis3-4cmabovethe mechanicalstageitiseasytodeterminethatstudentsneedalittlehelpfocusingthemicroscope.

Studentsusuallyhavenoproblemwiththepreparationofwetmountsotherthansometimestrappingairbubbles underthecoverslipornotputtingonacoverslipatall.Preparedslidesareeasytobeginwith,thoughmore expensivetoreplacethanthewetmountspreparedinlab.

TIME1.5hours

MATERIALS

Compoundlightmicroscopes

Preparedslidewiththelettere(ornewsprintandrazorblades)

Transparentmetricrulersorsectionsofoverheadacetatesofrulers

Glassmicroscopeslides

Coverslips

Lenspaper

Kimwipesorothercleaningpaper

Lenscleaner

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Smalldropperbottleofwater(1pertable)

1%methylenebluesolution(1partmethylenebluecrystalsin100partsabsolutealcohol) Toothpicks

Histologicalslidesofkidney,stomach,orliver

Silkthreadspreparedslide

REVIEWANSWERS

1. a.70X b.150X c.200X

2.Coverslip

3.a.compoundmicroscope

4.Fieldofview

5.Tocontroltheamountoflightenteringthemicroscopeandadjustthedepthoffield

6.2.8mm

7. a.ocularlens b.bodytube c.arm

d.coarse-focusknob e.base f.objectivelens g.stage h.lightsource

8.Thereislessworkingdistance.

9.Thefieldofviewdecreaseswithincreasingmagnification.

10.Youshouldusethelow-powerobjectivelenswhenyoufirstexaminethemicroscopeslide.

11.Youshouldcleanthelensesofthemicroscopewithspeciallenspaperbyusingthepaperonce,thenthrowingit away.

12.Itisimportanttocarrythemicroscopeuprightandwithtwohands.

13.Itisapproximately1.5mm

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Chapter1 TheHumanOrganism

StudentLearningOutcomes

Afterreadingthischapter,studentsshouldbeableto:

1.1ADefineanatomyanddescribethelevelsatwhichanatomycanbestudied.

1.1BDefinephysiologyanddescribethelevelsatwhichphysiologycanbestudied.

1.1CExplaintheimportanceoftherelationshipbetweenstructureandfunction.

1.2ANamethesixlevelsoforganizationofthebody,anddescribethemajorcharacteristics ofeachlevel.

1.2BListthe11organsystems,identifytheircomponents,anddescribethemajorfunctions ofeachsystem.

1.3AListanddefinethesixcharacteristicsoflife

1.4AExplainwhyitisimportanttostudyotherorganismsalongwithhumans.

1.5ADefinehomeostasisandexplainwhyitisimportantforproperbodyfunction.

1.5BDescribeanegative-feedbackmechanismandgiveanexample.

1.5CDescribeapositive-feedbackmechanismandgiveanexample.

1.6ADescribeapersonintheanatomicalposition.

1.6BDefinethedirectionaltermsforthehumanbody,andusethemtolocatespecificbody structures.

1.6CKnowthetermsforthepartsandregionsofthebody.

1.6DNameanddescribethethreemajorplanesofthebody.

1.6ENameanddescribethethreemajorwaystocutanorgan.

1.6FDescribethemajortrunkcavitiesandtheirdivisions.

1.6GLocateorgansintheirspecificcavity,abdominalquadrant,orregion.

1.6HDescribetheserousmembranes,theirlocations,andfunctions.

ChapterOutline

1.1AnatomyandPhysiology

1.Anatomyisthestudyofthebody’sstructures.

 Developmentalanatomyconsidersanatomicalchangesfromconceptiontoadulthood. Embryologyfocusesonthefirst8weeksofdevelopment.

 Cytologyexaminescells,andhistologyexaminestissues.

 Grossanatomystudiesorgansfromeitherasystemicoraregionalperspective.

2.Surfaceanatomyusessuperficialstructurestolocatedeeperstructures,andanatomical imagingisanoninvasivetechniqueforidentifyingdeepstructures.

3.Physiologyisthestudyofthebody’sfunctions.Itcanbeapproachedfromacellularora systemspointofview.

4.Pathologydealswithallaspectsofdisease.Exercisephysiologyexamineschanges causedbyexercise.

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1.2StructuralandFunctionalOrganizationoftheHumanBody

1.Basicchemicalcharacteristicsareresponsibleforthestructureandfunctionsoflife.

2.Cellsarethebasicstructuralandfunctionalunitsoforganisms,suchasplantsand animals.Organellesaresmallstructureswithincellsthatperformspecificfunctions.

3.Tissuesarecomposedofgroupsofcellsofsimilarstructureandfunctionandthe materialssurroundingthem.Thefourprimarytissuetypesareepithelial,connective, muscle,andnervoustissues.

4.Organsarestructurescomposedoftwoormoretissuesthatperformspecificfunctions.

5.Organsarearrangedintothe11organsystemsofthehumanbody.

6.Organsystemsinteracttoformawhole,functioningorganism.

1.3CharacteristicsofLife

Humanssharemanycharacteristicswithotherorganisms,suchasorganization, metabolism,responsiveness,growth,development,andreproduction.

1.4BiomedicalResearch

Muchofourknowledgeabouthumansisderivedfromresearchonotherorganisms.

1.5Homeostasis

Homeostasisistheconditioninwhichbodyfunctions,bodyfluids,andotherfactorsofthe internalenvironmentaremaintainedatlevelssuitabletosupportlife.

NegativeFeedback

1.Negative-feedbackmechanismsmaintainhomeostasis.

2.Manynegative-feedbackmechanismsconsistofareceptor,acontrolcenter,and aneffector.

PositiveFeedback

1.Positive-feedbackmechanismsusuallyincreasedeviationsfromnormal.

2.Althoughafewpositive-feedbackmechanismsnormallyexistinthebody,most positive-feedbackmechanismsareharmful.

3.Normalpositive-feedbackmechanismsincludebloodclottingandchildbirth labor.Harmfulpositive-feedbackexamplesincludedecreasedbloodflowtothe heart.

1.6TerminologyandtheBodyPlan

BodyPositions

1.Ahumanstandingerectwiththefacedirectedforward,thearmshangingtothesides, andthepalmsfacingforwardisintheanatomicalposition.

2.Apersonlyingfaceupwardissupine;apersonlyingfacedownwardisprone.

DirectionalTerms

Directionaltermsalwaysrefertotheanatomicalposition,nomatterwhattheactual positionofthebody.

BodyPartsandRegions

1.Thebodycanbedividedintoacentralregion,consistingofthehead,neck,andtrunk, andtheupperlimbsandlowerlimbs.

2.Superficially,theabdomencanbedividedintoquadrantsorintonineregions.These divisionsareusefulforlocatinginternalorgansordescribingthelocationofapainor atumor.

Planes

1.PlanesoftheBody

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 Asagittalplanedividesthebodyintorightandleftparts.Amedianplanedivides thebodyintoequalrightandlefthalves.

 Atransverse(horizontal)planedividesthebodyintosuperiorandinferior portions.

 Afrontal(coronal)planedividesthebodyintoanteriorandposteriorparts.

2.SectionsofanOrgan

 Alongitudinalsectionofanorgandividesitalongthelongaxis.

 Atransverse(cross)sectioncutsatarightangletothelongaxisofanorgan.

 Anobliquesectioncutsacrossthelongaxisofanorganatanangleotherthana rightangle.

BodyCavities

1.Themediastinumsubdividesthethoraciccavity.

2.Thediaphragmseparatesthethoracicandabdominalcavities.

3.Pelvicbonessurroundthepelviccavity.

SerousMembranes

1.Serousmembraneslinethetrunkcavities.Theparietalportionofaserousmembrane linesthewallofthecavity,andthevisceralportionisincontactwiththeinternal organs.

 Theserousmembranessecretefluid,whichfillsthespacebetweenthevisceral andparietalmembranes.Theserousmembranesprotectorgansfromfriction.

 Thepericardialcavitysurroundstheheart,thepleuralcavitiessurroundthelungs, andtheperitonealcavitysurroundscertainabdominalandpelvicorgans.

2.Mesenteriesarepartsoftheperitoneumthatholdtheabdominalorgansinplaceand provideapassagewayforbloodvesselsandnervestotheorgans.

3.Retroperitonealorgansarelocated“behind”theparietalperitoneum.

TopicsRelatedtotheStudyofAnatomyandPhysiology

Theuseofanimalsinresearchisrelevant,andthestudentsmayhavestrongopinionsaboutthe ethicalissuesinvolved.Discussprosandcons(includingfinancialconsiderations)for alternativestoanimalexperimentation,suchastissuecultureandcomputersimulation.

Anatomicalanomaliescanbeusedfordiscussionconcerningtheconceptofnormal.Anatomy andphysiologyarerepletewithreferencestonormalandabnormalstructuresandvalues. Studentswillbenefitfromtheclarificationofthemeaningoftheword“normal"asitwillbe usedwithinthecontextofthecourse.

Newspaper,magazine,orinternetsourcesrelatedtothenewimagingtechnologiescanhelp studentsappreciatetheamountofknowledgeofanatomyandphysiologyadiagnosticianmust possessinordertointerpretthosepotentiallymeaninglessimages.UsetheClinicalImpact: AnatomicalImaging,asthestartingpointforahomeworkassignmenttofindoutmore information.

Theexcellentphotographsfoundonthefirstpageofeverychapterillustratetechnological advancesinimagingtechniques.Theadventsoftheelectronmicroscope,patch-clamping, micro-electrodes,andradio-immunoassayhaveincreasedourabilitytoinvestigatecellstructures

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andcellmembranetransport.Thenewestscanningtunnelingelectronmicroscopeshavetaken resolutiondowntothelevelofindividualmolecules.Classdiscussioncouldfocusonthe intriguingareaofcellularresearch.TheClinicalImpact:MicroscopicImaging,providesmore information.

ThemesinChapter1

StructureandFunction

MedicalTerminology

“WheninRome…”isaconceptthatcouldbeappliedtoknowingandusinganatomicaland medicalterminology.Studentsmustusetheirlanguageinordertocommunicatewithother scientistsandhealthcareprofessionals.Studentsneedtolearnthatthereisvalueinthe precisionofanatomicalterminology.Thenotionthatthebodyisacollectionofinterlocking partsisaconceptforeigntomanystudents,whoviewthebodyasasingularandsolidentity. Studentsmaynotrealizethereisaconnectionbetweenthewordsthatareusedinclassand theirownbodies.Pointoutthevaluablelistofprefixes,suffixes,andcombiningformsonthe backcoverofthebookandtheGlossary(pagesG-1toG-32)thatwillhelpthemgaina masteryofthis“new”language.AlsousefulisTable1.2,DirectionalTermsforHumans.

Homeostasis

Feedback

Spendtimeontheconceptsofpositiveandnegativefeedbacktoensurestudentunderstanding. Provideexamplesinadditiontothoseprovidedinthetext.Askstudentstothinkaboutand thendiscussexamplesofeventsthatpushthebodyoutofhomeostasisandhowthebody returnstohomeostasis.Discusswaysthebodycanbehelpedtoreturntohomeostasisin emergencies.BesurestudentsunderstandhowtointerprettheProcessFigure1.5and HomeostasisFigure1.6,becausethisformatisusedthroughoutthebookandcanbean invaluabletoolinunderstandingcomplexbodyprocesses.

CellTheoryandBiochemistry

Studentsmustassimilatethisfoundationalknowledgebeforetheycangraspmorecomplex physiologicalprocesseslikecellmembranetransportandcell-to-cellcommunication.Stress thepivotalpositionofcellsandbiochemistryinunderstandinghigherlevelsoforganization.

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ChangesthroughTime

Studentsmustgraspthedifferencebetweenstructures/partsandfunctions/processes. Introducetheelementoftimeandthepossibilityofchangethroughtime(momenttomoment, overthelifespan,andevolutionarily)inbothstructuresandfunctions.

LearningOutcomesCorrelationwithPredictQuestionTypes

Chapter2

TheChemicalBasisofLife

StudentLearningOutcomes

Afterreadingthischapter,studentsshouldbeableto:

2.1ADefinematter,mass,andweight.

2.1BDistinguishbetweenelementsandatoms,andstatethefourmostabundantelementsin thebody.

2.1CNamethesubatomicparticlesofanatom,andindicatetheirmass,charge,andlocation inanatom.

2.1DDefineatomicnumber,massnumber,isotope,atomicmass,andmole.

2.1ECompareandcontrastionicandcovalentbonds.

2.1FDifferentiatebetweenamoleculeandacompound.

2.1GExplainwhatcreatesahydrogenbondandrelateitsimportance.

2.1HDescribesolubilityandtheprocessofdissociation,andpredictifacompoundor moleculeisanelectrolyteornonelectrolyte.

2.2ASummarizethecharacteristicsofsynthesis,decomposition,reversible,andoxidationreductionreactions.

2.2BIllustratewhatoccursindehydrationandhydrolysisreactions.

2.2CExplainhowreversiblereactionsproducechemicalequilibrium.

2.2DContrastpotentialandkineticenergy.

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2.2EDistinguishbetweenchemicalreactionsthatreleaseenergyandthosethattakein energy.

2.2FDescribethefactorsthatcanaffecttherateofchemicalreactions.

2.3ADistinguishbetweeninorganicandorganiccompounds.

2.3BDescribehowthepropertiesofwatercontributetoitsphysiologicalfunctions.

2.3CDescribethepHscaleanditsrelationshiptoacidic,basic,andneutralsolutions.

2.3DExplaintheimportanceofbuffersinorganisms.

2.3EComparetherolesofoxygenandcarbondioxideinthebody.

2.4ADescribethestructuralorganizationandmajorfunctionsofcarbohydrates,lipids, proteins,andnucleicacids.

2.4BExplainhowenzymeswork.

2.4CDescribetherolesofnucleicacidsinthestructuresandfunctionsofDNA,RNA,and ATP.

ChapterOutline

2.1BasicChemistry Matter,Mass,andWeight

1.Matterisanythingthatoccupiesspaceandhasmass.

2.Massistheamountofmatterinanobject.

3.Weightresultsfromtheforceexertedbyearth’sgravityonmatter. ElementsandAtoms

1.Anelementisthesimplesttypeofmatterhavinguniquechemicalandphysical properties.

2.Anatomisthesmallestparticleofanelementthathasthechemicalcharacteristicsof thatelement.Anelementiscomposedofonlyonekindofatom.

3.Atomsconsistofprotons,neutrons,andelectrons.

 Protonsarepositivelycharged,electronsarenegativelycharged,andneutrons havenocharge.

 Protonsandneutronsareinthenucleus;electronsarelocatedaroundthenucleus, andcanberepresentedbyanelectroncloud.

4.Theatomicnumberistheuniquenumberofprotonsinanatom.Themassnumberis thesumoftheprotonsandtheneutrons.

5.Isotopesareatomsthathavethesameatomicnumberbutdifferentmassnumbers.

6.Theatomicmassofanelementistheaveragemassofitsnaturallyoccurringisotopes weightedaccordingtotheirabundance.

7.AmoleofasubstancecontainsAvogadro’snumber(6.022x1023)ofatoms,ions,or molecules.Themolarmassofasubstanceisthemassof1moleofthesubstance expressedingrams.

ElectronsandChemicalBonding

1.Thechemicalbehaviorofatomsisdeterminedmainlybytheiroutermostelectrons.A chemicalbondoccurswhenatomsshareortransferelectrons.

2.Ionsareatomsthathavegainedorlostelectrons.

 Anatomthatloses1ormoreelectronsbecomespositivelychargedandiscalleda cation.Ananionisanatomthatbecomesnegativelychargedafteraccepting1or moreelectrons.

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 Anionicbondresultsfromtheattractionoftheoppositelychargedcationand aniontoeachother.

3.Acovalentbondformswhenelectronpairsaresharedbetweenatoms.Apolar covalentbondresultswhenthesharingofelectronsisunequalandcanproducea polarmoleculethatiselectricallyasymmetric.

MoleculesandCompounds

1.Amoleculeistwoormoreatomschemicallycombinedtoformastructurethat behavesasanindependentunit.Acompoundistwoormoredifferenttypesofatoms chemicallycombined.

2.Thekindsandnumbersofatoms(orions)inamoleculeorcompoundcanbe representedbyaformulaconsistingofthesymbolsoftheatoms(orions)plus subscriptsdenotingthenumberofeachtypeofatom(orion).

3.Themolecularmassofamoleculeorcompoundcanbedeterminedbyaddingupthe atomicmassesofitsatoms(orions).

IntermolecularForces

1.Ahydrogenbondistheweakattractionbetweentheoppositelychargedregionsof polarmolecules.Hydrogenbondsareimportantindeterminingthethree-dimensional structureoflargemolecules.

2.Solubilityistheabilityofonesubstancetodissolveinanother.Ionicsubstancesthat dissolveinwaterbydissociationareelectrolytes.Moleculesthatdonotdissociateare nonelectrolytes.

2.2ChemicalReactionsandEnergy SynthesisReactions

1.Asynthesisreactionisthechemicalcombinationoftwoormoresubstancestoforma neworlargersubstance.

2.Adehydrationreactionisasynthesisreactioninwhichwaterisproduced.

3.Thesumofallthesynthesisreactionsinthebodyiscalledanabolism. DecompositionReactions

1.Adecompositionreactionisthechemicalbreakdownofalargersubstancetotwoor moredifferentandsmallersubstances.

2.Ahydrolysisreactionisadecompositionreactioninwhichwaterisdepleted.

3.Thesumofallthedecompositionreactionsinthebodyiscalledcatabolism. ReversibleReactions

Reversiblereactionsproduceanequilibriumconditioninwhichtheamountofreactants relativetotheamountofproductsremainsconstant.

Oxidation-ReductionReactions

Oxidation-reductionreactionsinvolvethecompleteorpartialtransferofelectrons betweenatoms.

Energy

1.Energyistheabilitytodowork.Potentialenergyisstoredenergy,andkineticenergy isenergyresultingfromthemovementofanobject.

2.Chemicalenergy

 Chemicalbondsareaformofpotentialenergy.

 Chemicalreactionsinwhichtheproductscontainmorepotentialenergythanthe reactantsrequiretheinputofenergy.

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 Chemicalreactionsinwhichtheproductshavelesspotentialenergythanthe reactantsreleaseenergy.

3.Heatenergy

 Heatenergyisenergythatflowsbetweenobjectsthatareatdifferent temperatures.

 Heatenergyisreleasedinchemicalreactionsandisresponsibleforbody temperature.

SpeedofChemicalReactions

1.Activationenergyistheminimumenergythatthereactantsmusthavetostarta chemicalreaction.

2.Enzymesarespecializedproteincatalyststhatlowertheactivationenergyfor chemicalreactions.Enzymesspeedupchemicalreactionsbutarenotconsumed oralteredintheprocess.

3.Increasedtemperatureandconcentrationofreactantscanincreasetherateof chemicalreactions.

2.3InorganicChemistry

Inorganicchemistryismostlyconcernedwithnon-carbon-containingsubstancesbutdoes includesomecarbon-containingsubstances,suchascarbondioxideandcarbonmonoxide thatlackcarbon-hydrogenbonds.Someinorganicchemicalsplayimportantrolesinthe body.

Water

1.Waterisapolarmoleculecomposedofoneatomofoxygenandtwoatomsof hydrogen.

2.Becausewatermoleculesformhydrogenbondswitheachother,waterisgoodat stabilizingbodytemperature,protectingagainstfrictionandtrauma,makingchemical reactionspossible,directlyparticipatinginchemicalreactions(e.g.,dehydrationand hydrolysisreactions),andservingasamixingmedium(e.g.,solutions,suspensions, andcolloids).

3.Amixtureisacombinationoftwoormoresubstancesphysicallyblendedtogether, butnotchemicallycombined.

4.Asolutionisanyliquid,gas,orsolidinwhichthesubstancesareuniformly distributedwithnoclearboundarybetweenthesubstances.

5.Asolutedissolvesinthesolvent.

6.Asuspensionisamixturecontainingmaterialsthatseparatefromeachotherunless theyarecontinually,physicallyblendedtogether.

7.Acolloidisamixtureinwhichadispersed(solutelike)substanceisdistributed throughoutadispersing(solventlike)substance.Particlesdonotsettleoutofa colloid.

SolutionConcentrations

1.Onemeasurementofsolutionconcentrationistheosmole,whichcontains Avogadro’snumber(6.022x1023)ofparticles(i.e.,atoms,ions,ormolecules)in1 kilogramofwater.

2.Amilliosmoleis1/1000ofanosmole.

AcidsandBases

1.Acidsareproton(H+)donors,andbases(OH-)areprotonacceptors.

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2.Astrongacidorbasealmostcompletelydissociatesinwater.Aweakacidorbase partiallydissociates.

3.ThepHscaleshowstheH+concentrationsofvarioussolutions.

 AneutralsolutionhasanequalnumberofH+andOH-andisassignedapHof7.

 Acidicsolutions,inwhichthenumberofH+isgreaterthanthenumberofOH, havepHvalueslessthan7.

 Basic,oralkaline,solutionshavemoreOH-thanH+andapHgreaterthan7.

4.AsaltisamoleculeconsistingofacationotherthanH+andananionotherthanOHSaltsformwhenacidsreactwithbases.

5.Abufferisasolutionofaconjugateacid-basepairthatresistschangesinpHwhen acidsorbasesareaddedtothesolution.

OxygenandCarbonDioxide

Oxygenisnecessaryforthereactionsthatextractenergyfromfoodmoleculesinliving organisms.Whentheorganicmoleculesarebrokendownduringmetabolism,carbon dioxideandenergyarereleased.

2.4OrganicChemistry

Organicmoleculescontaincarbonandhydrogenatomsboundtogetherbycovalentbonds.

Carbohydrates

1.Monosaccharidesarethebasicbuildingblocksofothercarbohydrates.Examplesare ribose,deoxyribose,glucose,fructose,andgalactose.Glucoseisanespecially importantsourceofenergy.

2.Disaccharidemoleculesareformedbydehydrationreactionsbetweentwo monosaccharides.Theyarebrokenapartintomonosaccharidesbyhydrolysis reactions.Examplesofdisaccharidesaresucrose,lactose,andmaltose.

3.Apolysaccharideiscomposedofmanymonosaccharidesboundtogethertoforma longchain.Examplesincludecellulose,starch,andglycogen.

Lipids

1.Triglyceridesarecomposedofglycerolandfattyacids.One,two,orthreefattyacids canattachtotheglycerolmolecule.

 Fattyacidsarestraightchainsofcarbonmoleculeswithacarboxylgroup.Fatty acidscanbesaturated(havingonlysinglecovalentbondsbetweencarbonatoms) orunsaturated(havingoneormoredoublecovalentbondsbetweencarbon atoms).

 Energyisstoredinfats.

2.Phospholipidsarelipidsinwhichafattyacidisreplacedbyaphosphate-containing molecule.Phospholipidsareamajorstructuralcomponentofplasmamembranes.

3.Steroidsarelipidscomposedoffourinterconnectedringmolecules.Examplesare cholesterol,bilesalts,andsexhormones.

4.Otherlipidsincludefat-solublevitamins,prostaglandins,thromboxanes,and leukotrienes.

Proteins

1.Thebuildingblocksofaproteinareaminoacids,whicharejoinedbypeptidebonds.

2.Thenumber,kind,andarrangementofaminoacidsdeterminetheprimarystructureof aprotein.Hydrogenbondsbetweenaminoacidsdeterminesecondarystructure,and hydrogenbondsbetweenaminoacidsandwaterdeterminetertiarystructure. Interactionsbetweendifferentproteinsubunitsdeterminequaternarystructure.

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3.Enzymesareproteincatalyststhatspeedupchemicalreactionsbyloweringtheir activationenergy.

4.Theactivesitesofenzymesbindonlytospecificreactants.

5.Cofactorsareionsororganicmolecules,suchasvitamins,thatarerequiredforsome enzymestofunction.

NucleicAcids:DNAandRNA

1.Thebasicunitofnucleicacidsisthenucleotide,whichisamonosaccharidewithan attachedphosphateandanorganicbase.

2.DNAnucleotidescontainthemonosaccharidedeoxyriboseandtheorganicbase adenine,thymine,guanine,orcytosine.DNAoccursasadoublestrandofjoined nucleotides.Eachstrandiscomplementaryandantiparalleltotheotherstrand.

3.AgeneisasequenceofDNAnucleotidesthatdeterminesthestructureofaproteinor RNA.

4.RNAnucleotidesarecomposedofthemonosaccharideribose.Theorganicbasesare thesameasforDNA,exceptthatthymineisreplacedwithuracil.

AdenosineTriphosphate

Adenosinetriphosphate(ATP)storesenergyderivedfromcatabolism.Theenergy releasedfromATPisusedinanabolismandothercellprocesses.

TopicsRelatedtoLevelsofOrganizationandtheChemicalBasisofLife

Manypeopleentertheirfirstcourseinanatomyandphysiologyenvisioningthebodyasasolid andsingularentitythathasteleologicalcontrolofitsinternalfunctions.Toincreasestudent understandingdevelopashortwrittenassignmentthatasksthemtointegratethevariouslevelsof organizationthatareintroducedhereandinChapter1.Here’sanexample:Chooseanybody partororgan,suchasthehandorheart.Nameallstructurallevelsofthechoiceincluding molecules,organelles,cells,tissues,organs,etc.

Introducetheproductionandusesofradioactiveisotopesduringthediscussionofatomic structure.UsetheClinicalImpact:ApplicationsofAtomicParticlesasareadingassignment andaskstudentstothinkaboutthepossibledamagetoothermacromolecules,suchasthecellular DNA,andtoweighthatriskagainstthepotentialtherapeuticbenefitsofradiationtherapy.

Manyclinicaltestshaveachemicalbasis.Forhomeworkhavestudentsresearchdiagnostictests andproceduresanddeterminethechemicalfoundationofeach.

Engineeringandbiologicalproblemsareassociatedwiththebioengineeringofsynthetic substancesthatreplacebodychemicalsortissues.Havetheclassdiscussthechemicaland biologicalconsiderationsofsuchnewtechnologiessuchas:Teflonhipreplacements,synthetic hormones,artificialheartvalves,andsyntheticblood.

ThemesinChapter2

StructureandFunction

EnzymeSpecificityandProteinFunctions

Althoughtherearemanyexamplesofstructuralandfunctionalrelationshipswithachemical

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basis,perhapstheexamplethatstudentscanmostreadilygraspisthelockandkeymodelof enzyme/substrateinteractions.Thismetaphoreasilyexpandstothenextlevelsof organization,whichareotherfunctionsofproteininthecellmembrane,cell,tissues,andthe body.Proteinshaveacomplexstructureandavarietyoffunctionsthatdependonspecific structuralparameters.Askstudents,“Howdoesthestructureofaproteinaffectitsfunction?” (Examples:collagen,insulin,hemoglobin)Changingthestructureofaproteinwillalterits functionalcapabilities.Thisthemerecursinthestudyofanatomyandphysiology.

FunctionsofOrganicMolecules

Thefollowingtablesareexcellentresourcesaboutthefunctionofthedifferentorganic moleculesinthebody:Table2.6,RoleofCarbohydratesintheBody,Table2.7,Roleof LipidsintheBody,andTable2.8,RoleofProteinsintheBody.

Homeostasis

ChemicalEquilibrium

Theconceptofchemicalequilibriumis,inessence,asimplerformofthedynamicequilibrium establishedandmaintainedbythebody.Helpstudentsexplorethesimilaritiesanddifferences betweenchemicalequilibriumandbiologicalhomeostasis.

LearningOutcomesCorrelationwithPredictQuestionTypes

Chapter3

StructureandFunctionoftheCell

StudentLearningOutcomes

Afterreadingthischapter,studentsshouldbeableto:

3.1AListthegeneralpartsofacell.

3.1BRelateandexplainthefourmainfunctionsofcells.

3.2ARelatethekindsofmicroscopesusedtostudycells.

3.3ADescribethefunctionsandgeneralstructureoftheplasmamembrane.

3.3BRelatewhyamembranepotentialisformed.

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3.4AListanddescribethefunctionsofmembranelipids.

3.4BExplainthenatureofthefluid-mosaicmodelofmembranestructure.

3.5AListandexplainthefunctionsofmembraneproteins.

3.5BDescribethecharacteristicsofspecificity,competition,andsaturationoftransport proteins.

3.6ADescribethenatureoftheplasmamembraneinreferencetopassageofmaterials throughit.

3.6BListandexplainthethreewaysthatmoleculesandionscanpassthroughtheplasma membrane.

3.6CDiscusstheprocessofdiffusionandrelateittoaconcentrationgradient.

3.6DExplaintheroleofosmosisandosmoticpressureincontrollingthemovementofwater acrosstheplasmamembrane.Illustratethedifferencesamonghypotonic,isotonic,and hypertonicsolutionsintermsofwatermovement.

3.6EDescribemediatedtransport.

3.6FCompareandcontrastfacilitateddiffusion,activetransport,andsecondaryactive transport.

3.6GDescribetheprocessesofendocytosisandexocytosis.

3.7ADescribethecompositionandfunctionsofthecytoplasm.

3.7BDescribethecompositionandfunctionofthecytoskeleton.

3.8ADefineorganelle.

3.8BDescribethestructureandfunctionofthenucleusandnucleoli.

3.8CExplainthestructureandfunctionofribosomes.

3.8DComparethestructureandfunctionsofroughandsmoothendoplasmicreticula.

3.8EDiscussthestructureandfunctionoftheGolgiapparatus.

3.8FDescribetheroleofsecretoryvesiclesinthecell.

3.8GComparethestructureandrolesoflysosomesandperoxisomesindigestingmaterial withinthecell.

3.8HRelatethestructureandfunctionofproteosomes.

3.8IDescribethestructureandfunctionofmitochondria.

3.8JExplainthestructureandfunctionofthecentrosome.

3.8KComparethestructureandfunctionofcilia,flagella,andmicrovilli.

3.9ADescribethetwo-stepprocessthatresultsingeneexpression.

3.9BExplaintherolesofDNA,mRNA,tRNA,andrRNAintheproductionofaprotein.

3.9CExplainwhatthegeneticcodeisandwhatitiscodingfor.

3.9DDescribewhatoccursduringposttranscriptionalprocessingandposttranslational processing.

3.9EDescribetheregulationofgeneexpression.

3.10ADescribethestagesofthecelllifecycle.

3.10BGivethedetailsofDNAreplication.

3.10CExplainwhatoccursduringmitosisandcytokinesis.

3.10DDefineapoptosis.

3.11AListthemajorhypothesesofaging.

ChapterOutline

3.1FunctionsoftheCell

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1.Theplasmamembraneformstheouterboundaryofthecell.

2.Thenucleusdirectsthecell’sactivities.

3.Thecytoplasm,betweenthenucleusandtheplasmamembrane,iswheremostcell activitiestakeplace.

4.Cellsperformthefollowingfunctions:

 Cellsmetabolizeandreleaseenergy.

 Cellssynthesizemolecules.

 Cellsprovideameansofcommunication.

 Cellsreproduceandprovideforinheritance.

3.2HowWeSeeCells

1.Lightmicroscopesallowustovisualizethegeneralfeaturesofcells.

2.Electronmicroscopesallowustovisualizethefinestructureofcells.

3.3PlasmaMembrane

1.Theplasmamembranepassivelyoractivelyregulateswhatentersorleavesthecell.

2.Theplasmamembraneiscomposedofaphospholipidbilayer,inwhichproteinsare suspended(commonlydepictedbythefluid-mosaicmodel).

3.4MembraneLipids

Lipidsgivetheplasmamembranemostofitsstructureandsomeofitsfunction.

3.5MembraneProteins

1.Membraneproteinsfunctionasmarkermolecules,attachmentproteins,transportproteins, receptorproteins,andenzymes.

2.Transportproteinsincludechannelproteins,carrierproteins,andATP-poweredpumps.

3.Somereceptorproteinsarelinkedtoandcontrolchannelproteins.

4.SomereceptormoleculesarelinkedtoGproteincomplexes,whichcontrolnumerous cellularactivities.

3.6MovementThroughthePlasmaMembrane

1.Lipid-solublemoleculespassthroughtheplasmamembranereadilybydissolvinginthe lipidbilayer.Smallmoleculesdiffusebetweenthephospholipidmoleculesoftheplasma membrane.

2.Largenon-lipid-solublemoleculesandions(e.g.,glucoseandaminoacids)are transportedthroughthemembranebytransportproteins.

3.Large,non-lipid-solublemolecules,aswellasverylargemoleculesandevenwholecells, canbetransportedacrossthemembraneinvesicles.

PassiveMembraneTransport

1.Diffusionisthemovementofasubstancefromanareaofhighersoluteconcentration tooneoflowersoluteconcentration(downaconcentrationgradient).

2.Theconcentrationgradientisthedifferenceinsoluteconcentrationbetweentwo pointsdividedbythedistanceseparatingthepoints.

3.Therateofdiffusionincreaseswithanincreaseintheconcentrationgradient,an increaseintemperature,adecreaseinmolecularsize,andadecreaseinviscosity.

4.Theendresultofdiffusionisuniformdistributionofmolecules.

5.Diffusionrequiresnoexpenditureofenergy.

6.Osmosisisthediffusionofwater(solvent)acrossaselectivelypermeablemembrane.

7.Osmoticpressureistheforcerequiredtopreventthemovementofwateracrossa selectivelypermeablemembrane.

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8.Isosmoticsolutionshavethesameconcentrationofsoluteparticles,hyperosmotic solutionshaveagreaterconcentrationofsoluteparticles,andhyposmoticsolutions havealesserconcentrationofsoluteparticles.

9.Cellsplacedinanisotonicsolutionneitherswellnorshrink.Inahypertonicsolution, theyshrink(crenate);inahypotonicsolution,theyswellandmayburst(lyse).

10.Mediatedtransportisthemovementofasubstanceacrossamembranebymeansofa transportprotein.Thesubstancestransportedtendtobelarge,water-soluble molecules.

11.Facilitateddiffusionmovessubstancesdowntheirconcentrationgradientanddoes notrequireenergy(ATP).

ActiveMembraneTransport

1.Activetransportcanmovesubstancesagainsttheirconcentrationgradientand requiresATP.Anexchangepumpisanactivetransportmechanismthat simultaneouslymovestwosubstancesinoppositedirectionsacrosstheplasma membrane.

2.Insecondaryactivetransport,anionismovedacrosstheplasmamembranebyactive transport,andtheenergyproducedbytheiondiffusingbackdownitsconcentration gradientcantransportanothermolecule,suchasglucose,againstitsconcentration gradient.

3.Vesiculartransportisthemovementoflargevolumesorreleaseofsubstancesacross theplasmamembranethroughtheformationorreleaseofavesicle.

4.Endocytosisisthebulkmovementofmaterialsintocells.

 Phagocytosisisthebulkmovementofsolidmaterialintocellsbytheformationof avesicle.

 Pinocytosisissimilartophagocytosis,exceptthattheingestedmaterialismuch smallerandisinsolution.

5.Receptor-mediatedendocytosisallowsforendocytosisofspecificmolecules.

6.Exocytosisisthesecretionofmaterialsfromcellsbyvesicleformation.

7.Endocytosisandexocytosisbothrequireenergy.

3.7Cytoplasm

Thecytoplasmisthematerialoutsidethenucleusandinsidetheplasmamembrane. Cytosol

1.Cytosolconsistsofafluidpart(thesiteofchemicalreactions),thecytoskeleton,and cytoplasmicinclusions.

2.Thecytoskeletonsupportsthecellandisresponsibleforcellmovements.Itconsists ofproteinfibers.

 Microtubulesarehollowtubescomposedoftheproteintubulin.Theyform spindlefibersandarecomponentsofcentrioles,cilia,andflagella.

 Actinfilamentsaresmallproteinfibrilsthatprovidestructuretothecytoplasmor causecellmovements.

 Intermediatefilamentsareproteinfibersthatprovidestructuralstrengthtocells.

3.Membranesdonotsurroundcytoplasmicinclusions,suchaslipochromes.

3.8TheNucleusandCytoplasmicOrganelles

Organellesaresubcellularstructuresspecializedforspecificfunctions.

TheNucleus

1.Thenuclearenvelopeconsistsofadoublemembranewithnuclearpores.

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2.DNAandassociatedproteinsarefoundinsidethenucleusaschromatin.

3.DNAisthehereditarymaterialofthecell.Itcontrolscellactivitiesbyproducing proteinsthroughRNA.

4.AgeneisaportionofaDNAmolecule.Genesdeterminetheproteinsinacell.

5.NucleoliconsistofRNAandproteinsandarethesitesofribosomalsubunitassembly.

Ribosomes

1.Ribosomesconsistofsmallandlargesubunitsmanufacturedinthenucleolusand assembledinthecytoplasm.

2.Ribosomesarethesitesofproteinsynthesis.

3.Ribosomescanbefreeorassociatedwiththeendoplasmicreticulum.

EndoplasmicReticulum

1.Theendoplasmicreticulumisanextensionoftheoutermembraneofthenuclear envelope;itformstubulesorsacs(cisternae)throughoutthecell.

2.Theroughendoplasmicreticulumhasribosomesandisasiteofproteinsynthesisand modification.

3.Thesmoothendoplasmicreticulumlacksribosomesandisinvolvedinlipid production,detoxification,andcalciumstorage.

GolgiApparatus

TheGolgiapparatusisaseriesofcloselypacked,modifiedcisternaethatmodify, package,anddistributelipidsandproteinsproducedbytheendoplasmicreticulum.

SecretoryVesicles

Secretoryvesiclesaremembrane-boundsacsthatcarrysubstancesfromtheGolgi apparatustotheplasmamembrane,wherethecontentsofthevesiclesarereleasedby exocytosis.

Lysosomes

1.Lysosomesaremembrane-boundsacscontaininghydrolyticenzymes.Withinthe cell,theenzymesbreakdownphagocytizedmaterialandnonfunctionalorganelles (autophagy).

2.Enzymesreleasedfromthecellbylysisorenzymessecretedfromthecellcandigest extracellularmaterial.

Peroxisomes

Peroxisomesaremembrane-boundsacscontainingenzymesthatdigestfattyacidsand aminoacids,aswellasenzymesthatcatalyzethebreakdownofhydrogenperoxide.

Proteasomes

Proteasomesarelarge,multienzymecomplexes,notboundbymembranesthatdigest selectedproteinswithinthecell.

Mitochondria

1.MitochondriaarethemajorsitesfortheproductionofATP,whichcellsuseasan energysource.

2.Themitochondriahaveasmoothoutermembraneandaninnermembranethatis infoldedtoformcristae.

3.MitochondriacontaintheirownDNA,canproducesomeoftheirownproteins,and canreplicateindependentlyofthecell.

CentriolesandSpindleFibers

1.Centriolesarecylindricalorganelleslocatedinthecentrosome,aspecializedzoneof thecytoplasmthatservesasthesiteofmicrotubuleformation.

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