Module 9 AP Psychology – Complete Study Guide, Practice Questions & Exam Review

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Module 9 AP Psychology
biological psychology - ANS-the scientific study of the links between biological and
psychological processes

Neuron - ANS-a nerve cell; the basic building block of the nervous system

Dendrites - ANS-a neuron's bushy, branching extensions that receive messages and
conduct impulses toward the cell body

Axon - ANS-the neuron extension that passes messages through its branches to other
neurons or to muscles or glands

myelin sheath - ANS-a fatty tissue layer segmentally encasing the axons of some
neurons; enables vastly greater transmission speed as neural impulses hop from one
node to the next

action potential - ANS-a neural impulse; a brief electrical charge that travels down an
axon

refractory period - ANS-a period of inactivity after a neuron has fired

threshold - ANS-the level of stimulation required to trigger a neural impulse

all-or-none response - ANS-a neuron's reaction of either firing (with a full-strength
response) or not firing.

Synapse - ANS-the junction between the axon tip of the sending neuron and the
dendrite or cell body of the receiving neuron

IMPORTANT TABLE TO MEMORIZE - ANS-

endorphins - ANS-"morphine within"--natural, opiatelike neurotransmitters linked to pain
control and to pleasure.

Agonist - ANS-a molecule that, by binding to a receptor site, stimulates a response

Antagonist - ANS-a molecule that, by binding to a receptor site, inhibits or blocks a
response




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