Psychopharmacology Drugs the Brain and Behavior 3rd Edition Meyer Test Bank

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Psychopharmacology, Third Edition Meyer • Quenzer

Chapter 1: Principles of Pharmacology Multiple Choice 1. _______ refer(s) to specific molecular changes that occur when a drug binds to a particular target site or receptor, while _______ are the resulting widespread alterations in function. a. Drug action; therapeutic effects b. Side effects; drug effects c. Therapeutic effects; side effects d. Drug action; drug effects Answer: d Textbook Reference: Pharmacology: The Science of Drug Action 2. After drug administration has occurred, the amount of drug in the blood that is free to bind at specific target sites is referred to as a. the therapeutic dose. b. first-pass effects. c. bioavailability. d. ED50.

Answer: c Textbook Reference: Pharmacokinetic Factors Determining Drug Action 3. The specific molecular changes that occur when a drug binds to a particular target site or receptor are referred to as a. drug effects. b. drug action. c. side effects. d. placebo effects.

Answer: b Textbook Reference: Pharmacology: The Science of Drug Action 4. Which of the following is not a possible explanation for placebo effects? a. Pavlovian conditioning b. Genetic variation c. Drug competition d. Expectation of outcome Answer: c Textbook Reference: Pharmacology: The Science of Drug Action

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5. The _______ administration of oxytocin has been proposed as a treatment for autism. a. intravenous b. oral c. intranasal d. intracerebral Answer: c Textbook Reference: Pharmacokinetic Factors Determining Drug Action 6. Which factor does not affect the pharmacokinetics of a drug? a. Route of administration b. Lipid solubility c. Depot binding d. Drug action Answer: d Textbook Reference: Pharmacokinetic Factors Determining Drug Action 7. First-pass metabolism occurs when drugs are taken a. orally. b. intravenously. c. subcutaneously. d. nasally.

Answer: a Textbook Reference: Pharmacokinetic Factors Determining Drug Action 8. The area postrema is one area in the brain where the _______ is not complete. a. cerebrospinal fluid b. blood–brain barrier c. choroid plexus d. phospholipid membrane Answer: b Textbook Reference: Pharmacokinetic Factors Determining Drug Action 9. First-pass metabolism occurs with orally administered drugs because a. their absorption is slowed by food. b. drugs absorbed into the bloodstream from the stomach go to the liver on the way to general circulation. c. drugs must first survive the acidic environment of the stomach. d. salivary enzymes in the mouth begin the process of metabolism.

Answer: b Textbook Reference: Pharmacokinetic Factors Determining Drug Action 10. Toxic substances in the blood trigger a vomiting response by activating the a. blood–brain barrier. b. choroid plexus. c. area postrema. d. median eminence.

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Answer: c Textbook Reference: Pharmacokinetic Factors Determining Drug Action 11. Drugs administered _______ have the most rapid onset of action. a. subcutaneously b. intramuscularly c. orally d. intravenously Answer: d Textbook Reference: Pharmacokinetic Factors Determining Drug Action 12. Ionization of a drug depends on the _______ of the solution and the _______ of the drug. a. pH; pKa b. pKa; pH c. concentration; lipid solubility d. pH; concentration Answer: a Textbook Reference: Pharmacokinetic Factors Determining Drug Action 13. The absorption of a drug depends on all of the following except a. lipid solubility. b. ionization. c. body temperature. d. the concentration of the drug.

Answer: c Textbook Reference: Pharmacokinetic Factors Determining Drug Action 14. Drugs that are _______ should be avoided by women of childbearing age. a. teratogenic b. able to cross the placental barrier c. psychoactive d. highly lipid-soluble Answer: a Textbook Reference: Pharmacokinetic Factors Determining Drug Action 15. Agents that induce developmental abnormalities in a fetus are known as a. psychoactive drugs. b. illicit drugs. c. teratogens. d. placental drugs.

Answer: c Textbook Reference: Pharmacokinetic Factors Determining Drug Action 16. Depot binding is said to occur when drugs a. bind to their target sites.

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b. bind to inactive sites. c. compete for binding sites. d. are excreted before binding.

Answer: b Textbook Reference: Pharmacokinetic Factors Determining Drug Action 17. Which statement about depot binding is false? a. It reduces the concentration of drug at its site of action. b. It may delay the onset of drug action. c. It may prolong drug action by disrupting normal metabolism. d. It increases the concentration of drug at its site of action by releasing large quantities at once.

Answer: d Textbook Reference: Pharmacokinetic Factors Determining Drug Action 18. Drug metabolism mostly occurs in the _______ and usually makes a drug more _______ soluble. a. kidneys; fat b. liver; fat c. liver; water d. kidneys; water Answer: c Textbook Reference: Pharmacokinetic Factors Determining Drug Action 19. Which statement about drug clearance by first-order kinetics is false? a. Molecules of a drug are cleared at a constant rate regardless of drug concentration. b. Molecules of a drug are cleared at an exponential rate. c. A constant fraction of the free drug in the blood is removed in each time interval. d. Clearance of most drugs occurs in this manner.

Answer: a Textbook Reference: Pharmacokinetic Factors Determining Drug Action 20. Ethyl alcohol (ethanol) is an example of a drug that is eliminated a. by first-order kinetics. b. by zero-order kinetics. c. by second-order kinetics. d. at the point that six half-lives have passed.

Answer: b Textbook Reference: Pharmacokinetic Factors Determining Drug Action 21. Biotransformation of drugs in the liver often occurs in two stages; phase I changes are _______ and include _______. a. nonsynthetic; conjugation b. synthetic; conjugation c. nonsynthetic; oxidation d. synthetic; oxidation

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Answer: c Textbook Reference: Pharmacokinetic Factors Determining Drug Action 22. Biotransformation of drugs can result in the formation of _______, which enter the circulation and cause _______. a. inactive metabolites; sensitization b. active metabolites; prolonged drug action c. active metabolites; tolerance d. enzymes; tolerance Answer: b Textbook Reference: Pharmacokinetic Factors Determining Drug Action 23. Which statement about water-soluble metabolites formed in the liver is false? a. They may return to the circulation and act on target tissues. b. They may be filtered out by the kidneys. c. They may be excreted into bile. d. They may be eliminated with the feces.

Answer: a Textbook Reference: Pharmacokinetic Factors Determining Drug Action 24. Which statement about microsomal enzymes in the liver is false? a. They are highly specific and act only on certain compounds. b. They are located on the smooth endoplasmic reticulum. c. The cytochrome P450 family is one of the most important. d. They can metabolize toxins and environmental pollutants as well as drugs.

Answer: a Textbook Reference: Pharmacokinetic Factors Determining Drug Action 25. Repeated use of many psychoactive drugs can cause _______, which can speed up the rate of biotransformation of these drugs as well as others. a. drug competition b. enzyme inhibition c. enzyme induction d. tolerance Answer: c Textbook Reference: Pharmacokinetic Factors Determining Drug Action 26. Due to _______, antidepressants known as monoamine oxidase inhibitors (MAOIs) can cause cardiac arrhythmias and high blood pressure in patients that consume foods high in tyramine. a. sensitization b. tolerance c. drug competition d. enzyme inhibition Answer: d Textbook Reference: Pharmacokinetic Factors Determining Drug Action

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27. While drugs can be excreted from the body by several routes, the most important route of elimination is through the a. breath. b. sweat. c. feces. d. urine.

Answer: d Textbook Reference: Pharmacokinetic Factors Determining Drug Action 28. The liver and kidneys work together to _______ and _______ drugs, respectively. a. metabolize; excrete b. excrete; metabolize c. bind; metabolize d. absorb; excrete Answer: a Textbook Reference: Pharmacokinetic Factors Determining Drug Action 29. For drugs that have a narrow therapeutic window or potentially serious side effects, therapeutic drug monitoring uses _______ to determine the optimum dosage for a new patient. a. body temperature b. urine testing c. brain scans d. blood sampling Answer: d Textbook Reference: Therapeutic Drug Monitoring 30. While pharmacokinetics describes how the body deals with drugs, _______ describes how drug molecules interact with their targets. a. drug effect b. pharmacodynamics c. antagonist action d. agonist action Answer: b Textbook Reference: Pharmacodynamics: Drug–Receptor Interactions 31. In order for a drug to have an effect, it must first bind to a a. ligand. b. depot site. c. receptor. d. neurotransmitter.

Answer: c Textbook Reference: Pharmacodynamics: Drug–Receptor Interactions 32. Most drugs and neurotransmitters act upon

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a. intracellular receptors. b. membrane-bound receptors. c. protein synthesis. d. second messengers.

Answer: b Textbook Reference: Pharmacodynamics: Drug–Receptor Interactions 33. While most _______ receptors are membrane-bound on the cell surface, many _______ receptors are intracellular. a. drug; neurotransmitter b. hormone; drug c. neurotransmitter; hormone d. agonist; antagonist Answer: c Textbook Reference: Pharmacodynamics: Drug–Receptor Interactions 34. Ligands that have no effect on a receptor after binding are called a. antagonists. b. agonists. c. neurotransmitters. d. null ligands.

Answer: a Textbook Reference: Pharmacodynamics: Drug–Receptor Interactions 35. Both agonists and antagonists have _______ but only agonists have appreciable _______. a. interactions; affinity b. affinity; bioavailability c. efficacy; affinity d. affinity; efficacy Answer: d Textbook Reference: Pharmacodynamics: Drug–Receptor Interactions 36. A dose–response curve shows that noncompetitive antagonists alter both the _______ and the _______ of the agonist, while competitive antagonists alter only the _______. a. potency; efficacy; potency b. bioavailability; metabolism; bioavailability c. efficacy; potency; efficacy d. depot binding; metabolism; metabolism Answer: a Textbook Reference: Pharmacodynamics: Drug–Receptor Interactions 37. In the dose–response curve, a decrease in potency is indicated by a shift a. to the left. b. to the right. c. upward.

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d. downward.

Answer: b Textbook Reference: Pharmacodynamics: Drug–Receptor Interactions 38. Which of the following describes the interaction of two drugs when the combined drug effects are greater than would be predicted from that combination? a. Addictive effects b. Physiological antagonism c. Potentiation d. Tolerance Answer: c Textbook Reference: Pharmacodynamics: Drug–Receptor Interactions 39. After chronic use, the need to administer more of a drug to achieve the same drug effect is known as a. sensitization. b. antagonism. c. potentiation. d. tolerance.

Answer: d Textbook Reference: Biobehavioral Effects of Chronic Drug Use 40. Which factor does not cause tolerance? a. Conditioning b. Increased activity of liver enzymes c. Down-regulation of receptors d. Decreased kidney function Answer: d Textbook Reference: Biobehavioral Effects of Chronic Drug Use 41. Sensitization is most often seen with which class of drugs? a. Barbiturates b. Psychomotor stimulants c. Opiates d. Hallucinogens Answer: b Textbook Reference: Biobehavioral Effects of Chronic Drug Use 42. _______ tolerance occurs as a result of cellular adaptation to the presence of a specific drug. a. Cross b. Drug disposition c. Pharmacodynamic d. Behavioral Answer: c Textbook Reference: Biobehavioral Effects of Chronic Drug Use

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43. Which of the following is not a goal of pharmacogenetics? a. Assessing addiction potential b. Selecting the best drug for a given individual c. Predicting therapeutic outcome d. Minimizing serious toxic reactions Answer: a Textbook Reference: Pharmacogenetics and Personalized Medicine in Psychiatry

Short Answer/Essay 44. Write a coherent and informative paragraph using the following terms: nonspecific drug effects, double-blind experiment, placebo, subject expectation.

Answer: In contrast to specific drug effects that are dependent on the chemical activity of a drug–receptor interaction, nonspecific drug effects are determined by characteristics of the individual such as present mood or drug-taking experience. Placebo effects are an example of nonspecific effects because placebos have no chemical activity but depend on the expectations of the individual. Placebos are an important control in double-blind experiments because neither the patient nor the observer knows if the patient has received the active drug or placebo in order to avoid expectation of results or prejudice.

Textbook Reference: Pharmacology: The Science of Drug Action 45. List the factors that can influence biotransformation, and briefly explain how they can lead to individual differences in drug response.

Answer: Biotransformation can be influenced by enzyme induction, enzyme inhibition, drug competition, and individual differences in age, gender, and genetics. The increase in metabolizing enzymes (induction) increases the rate of biotransformation, causing tolerance. Inhibition of an enzyme by a drug increases the blood level of other drugs metabolized by that enzyme, causing toxicity. When two drugs compete for the limited number of enzyme molecules, higher blood levels of one or both may occur. Both young and older individuals have reduced metabolic capacity; men and women vary in enzyme activity, and genetic polymorphisms alter the rate of biotransformation.

Textbook Reference: Pharmacokinetic Factors Determining Drug Action 46. Explain why absorption of aspirin is slower from the intestine than from the stomach.

Answer: Because aspirin is a weak acid, it will remain in a non-ionized (lipid soluble) form in the acidic stomach and hence it will pass through the cell walls of the stomach to the blood. In the intestine, where the pH is more alkaline, the aspirin molecules will ionize to a greater extent, which reduce their movement through the cell walls to the blood.

Textbook Reference: Pharmacokinetic Factors Determining Drug Action 47. List and briefly describe the five major factors that determine the pharmacokinetics of drug action.

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Answer: Routes of administration determine how quickly and how completely the drug is absorbed into the blood. Absorption of the drug through cell membranes and into the blood precedes the distribution of the drug to all the cells in the body. Binding of the drug may occur at active target sites, to inert depots such as plasma proteins, or stored in bone or fat. Biotransformation influences the intensity and duration of drug effects because the amount of drug in the body at any one time is dependent on the dynamic balance between absorption and inactivation. Excretion of the drug with urine or feces eliminates it from the body.

Textbook Reference: Pharmacokinetic Factors Determining Drug Action 48. Define the therapeutic index and describe how it is calculated and why it is important.

Answer: The therapeutic index is a measure of drug safety and it is calculated by comparing the dose of a drug that produces a particular drug-induced toxic effect in 50% of a given population with the dose of the drug that produces a particular therapeutic effect. (TI = TD50 / ED50) When the TD50 and ED50 are very similar the TI is low and the probability of a toxic effect is great. When the TD50 is large and the ED50 is low, many patients will benefit from the drug and few will experience the toxic effect.

Textbook Reference: Pharmacodynamics: Drug–Receptor Interactions 49. Draw the dose–response curves for two drugs with the same efficacy, given that drug A is ten times as potent as drug B. Answer: See sample figure below.

Textbook Reference: Pharmacodynamics: Drug–Receptor Interactions 50. Compare and contrast competitive and noncompetitive antagonists.

Answer: Both types of antagonists reduce the effects of agonists, but by different means.

Competitive antagonists compete with agonists binding to receptors, but can be displaced by excess agonist. Hence, although the potency of an agonist is reduced and its dose– response curve is shifted to the right, its efficacy is not changed. In contrast,

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noncompetitive antagonists reduce the effects of agonists in ways other than receptor competition, such as disturbing the receptor’s cell membrane environment. In these cases the dose–response curve is distorted rather than shifted and the same maximum (efficacy) is not achieved.

Textbook Reference: Pharmacodynamics: Drug–Receptor Interactions 51. Define and explain receptor up-regulation and down-regulation.

Answer: Receptor up-regulation is an increase in receptor number that represents a compensatory change in the cell after prolonged absence of receptor agonists. Receptor down-regulation is a decrease in receptor number and reflects a compensatory change after chronic activation of the receptor. These changes are responsible for pharmacodynamic tolerance and also explain the rebound withdrawal syndrome that is characteristic of physical dependence.

Textbook Reference: Biobehavioral Effects of Chronic Drug Use 52. Describe briefly the four types of tolerance.

Answer: Acute tolerance occurs when a individual experiences greater effects of a drug as her blood level rises than when her blood level has fallen to the same point during the same episode. Metabolic tolerance occurs when repeated use of a drug increases its own rate of metabolism. Pharmacodynamic tolerance occurs when compensatory cellular adjustments occur in response to the prolonged presence of the drug. Behavioral tolerance is dependent on several types of learning (classical conditioning and operant conditioning) and the environment in which the drug is administered.

Textbook Reference: Biobehavioral Effects of Chronic Drug Use 53. What is state-dependent learning? Why does it occur?

Answer: State-dependent learning refers to the concept that tasks learned under the influence of a psychoactive drug will subsequently be performed better in the drugged state than in the nondrugged state. Likewise, tasks learned in the nondrugged state will be performed better in the nondrugged state than in the drugged state. This occurs because drug-induced internal cues become part of the environmental “set” and when any aspect of the environment, such as the experimental apparatus, changes, performance deteriorates.

Textbook Reference: Biobehavioral Effects of Chronic Drug Use 54. Explain how pharmacogenetic approaches could lead to better pharmacological treatment.

Answer: Pharmacogenetics investigates the genetic basis for variability in drug response among individuals. Variability can be explained by genetic differences in both pharmacokinetic and pharmacodynamic factors. However, the most studied are genetic differences in drug-metabolizing enzymes because variations in biotransformation lead to large differences in bioavailability responsible for variations in effectiveness and side effects. Knowing the inherited level of function of metabolizing enzymes could predict the correct dose for an individual to maximize benefits and avoid adverse drug effects.

Textbook Reference: Pharmacogenetics and Personalized Medicine in Psychiatry

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Psychopharmacology, Third Edition Meyer • Quenzer

Chapter 2: Structure and Function of the Nervous System Multiple Choice 1. Neurons rely on _______ for protection, metabolic support, and insulation. a. mitochondria b. glial cells c. axoplasm d. dendritic spines Answer: b Textbook Reference: Cells of the Nervous System 2. Neurons responsible for converting environmental stimuli into neural signals are known as a. sensory neurons. b. interneurons. c. motor neurons. d. pyramidal cells.

Answer: a Textbook Reference: Cells of the Nervous System 3. Neurons can be categorized by all of the following except by a. which neurotransmitters they release. b. their function (e.g., sensory versus motor). c. the size of the action potentials they generate. d. their morphology.

Answer: c Textbook Reference: Cells of the Nervous System 4. The _______ of the neuronal cell is/are found in the soma, while the _______ may be found throughout the cell. a. mitochondria; dendrites b. dendrites; axon c. nucleus; mitochondria d. nucleus; dendrites Answer: c Textbook Reference: Cells of the Nervous System 5. Mitochondria are responsible for generating _______ for the cell in the form of _______.

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a. energy; ATP b. energy; glucose c. cytoplasm; ATP d. cytoplasm; glucose Answer: a Textbook Reference: Cells of the Nervous System 6. Neurons exchange information primarily via a. somas. b. dendrites. c. axons. d. axon collaterals.

Answer: b Textbook Reference: Cells of the Nervous System 7. Dendritic spines serve to a. increase the surface area of the dendrite. b. insulate the axons. c. insulate the dendrites. d. protect the dendrites from degrading enzymes in the extracellular fluid.

Answer: a Textbook Reference: Cells of the Nervous System 8. The function of the axon is to transmit the _______, generated at the _______, to the terminals. a. axoplasm; soma b. action potential; axon hillock c. action potential; dendrites d. synaptic vesicles; axon hillock Answer: b Textbook Reference: Cells of the Nervous System 9. In a myelinated axon, action potentials are regenerated a. at the terminal buttons. b. all along the axon. c. at gaps in the myelin known as nodes of Ranvier. d. at the axon hillock.

Answer: c Textbook Reference: Cells of the Nervous System 10. Which statement about the myelin sheath is false? a. It is produced by glial cells. b. It increases the speed of signal conduction along the axon. c. It saves energy. d. It is found on all neurons.

Answer: d

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