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Chapter 2 - Myers PSYCHOLOGY(7th Ed Chapter2...

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Myers’ PSYCHOLOGY (7th Ed) Chapter 2    Neuroscience, Genetics and Behavior Slides adapted from J.A. McCubbin, PhD, Clemson University, Worth Publishers
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Neural Psychology Psycho Communication Biological Psychology Neuron a nerve cell the basic building block of the nervous system
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The Neuron
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4 Types of Neurons Sensory Neurons carry information to the CNS Motor Neurons carry instructions to the body’s organs and tissues Interneurons link the sensory and motor neurons
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Neural Communication Action Potential   a neural impulse;  a brief electrical charge that  travels down an axon Threshold   the level of stimulation required to trigger a  neural impulse Myelin Sheath   insulates the axons of some neurons and  helps speed their impulses
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Neural Communication Cell body end of axon Direction of neural impulse: toward axon terminals
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How does the signal jump across the synaptic gap?
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Neural Communication Synapse  junction between the axon tip of sending neuron and  dendrite or cell body of receiving neuron tiny gap is called the synaptic gap or cleft Neurotransmitters chemical messengers that traverse the synaptic gaps  between neurons when released by the sending neuron, neurotransmitters  travel across the synapse and bind to receptor sites on  the receiving neuron, thereby influencing whether it will  generate a neural impulse
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Neural Communication
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Neural Communication Acetylcholine  a neurotransmitter that,  among its functions, triggers muscle  contraction Endorphins    “morphine within”  natural, opiate-like neurotransmitters  linked to pain control and to pleasure
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