Page 1

Psychology I Unit III: Inner-Self

Compiled by: Mr. Mark Darket

Unit III: Inner-Self A.

Body and Mind 1. 2. 3. 4. 5. 6. 7.


Nervous System The Brain Sensation Perception Threshold, adaptation, constancy Depth perception Attention

Personality 1. 2. 3. 4. 5. 6.

Motivation Biological needs Psychology needs Emotions Theories of personality Gender roles

Unit III: Inner-Self A.

Body and Mind 1.

The Nervous System

Lesson Questions 1.

2. 3.


How are messages transmitted by neurons, and what are the functions of the peripheral nervous system? What are the major structures of the brain, and what is the function of each structure? How do hormones secreted by the major glands of the endocrine system affect the body? What is the role of chromosomes and genes in heredity, and how do psychologists study the role of heredity in determining traits?

Childish Video on the Nervous System

The Nervous System 

The human nervous system is involved in thinking, dreaming, feeling, moving, and much more.  

Active or still Sleeping or awake

When we learn a new behavior or acquire new information, the nervous system registers the experience and changes to accommodate storage. The nervous system has two main parts 1. 2.

The central nervous system – the brain and spinal cord Peripheral nervous system – nerve cells

The Nervous System

Neurons  Neurons

are nerve cells which run through our entire body and communicate with each other.  The neurons send and receive messages from other structures in the body, such as muscles and glands  Each of us has over 100 billion neurons.

The Anatomy of Two Neurons “Messages” enter neurons through the dendrites. These messages are transmitted along the trunk-like axon to other neurons, glands, and muscles. On many neurons, the myelin sheath protects the axon. 1.Cell body – produces energy that fuels the cell 2.Dendrites – branchlike fibers that receive information from other neurons and pass the message through the cell body 3.Axon – transmits impulses away from the neuron cell body 4.Myelin sheath – fatty substance protecting the axon 5.Axon terminals – small fibers at the end of the axon to transmit messages

The Communication Process Messages are sent from the axon terminals of one neuron to the dendrites of other neurons.  In order for a message to be sent from one neuron to another neuron, it must cross the synapse  The synapse is a junction between the axon terminals of one neuron and the dendrites of another neuron 

The Synapse There is no physical connection between neurons. A neuron relays its message across a junction called a synapse by releasing chemicals called neurotransmitters. They are received by the next neuron

Neurotransmitters •

• •

Neurotransmitters are chemicals that are stored in sacs in the axon terminals They fire like droplets of water shooting out of a spray bottle There are several kinds of neurotransmitters each with its own structure and fit to the next neuron. Acetylcholine is involved in the control of muscles Dopamine is essential for motor behavior • •

Too much = Schizophrenia Too little = Parkinson’s Disease


Central Nervous System  The

brain and the spinal cord are the components of the central nervous system.  The spinal cord extends from the brain down the back. It is a column of nerves about as thick as thumb.  It transmits messages between the brain and the muscles and the glands throughout the body.

The Peripheral Nervous System  This

system spreads the messages from the central nervous system throughout the rest of the body.  The two main divisions of the peripheral nervous system are:  

Somatic nervous system Autonomic nervous system

Divisions of the Peripheral Nervous System Somatic Nervous System Autonomic Nervous System 

Transmits sensory memory to the central nervous system. It is activated by touch, pain, changes in temperature, and changes in body position. It enables us to feel the differences between hot and cold and to feel pain and pressure.

 

Autonomic = involuntary This system regulates heartbeat, breathing, digestion, and blood pressure Sympathetic nervous system is activated when the body goes into action. The parasympathetic nervous system restores the body’s energy reserves after action has taken place.

Unit III: Inner-self A.

Body and Mind 2.

The Brain

Forebrain (Cerebrum)

ral Cereb x Corte

Corpus Callosum

Midbrain Pons

Hypo thala mus Thala mus

Medulla Oblongata Spinal cord

Hindbrain (Cerebellum)

Parts of the Brain  The

human brain is composed of many parts that work together to organize our movements, thoughts, emotions, and behaviors.  Psychologists generally divide the parts of the brain in the following way   

Hindbrain – vitals and balance Midbrain – vision and hearing Forebrain – complex thought and emotion

The Hindbrain

The Forebrain

The Midbrain

Psych I - Unit III  

Notes for Psychology I Unit III

Read more
Read more
Similar to
Popular now
Just for you