psycology vocab #1

Question 1

Neuron

Answer 1

nerve cells that send messages all over your body to allow you to do everything from breathing to talking, eating, walking, and thinking

Question 2

Cell body

Answer 2

contains the nucleus; cells life support center

Question 3

Dendrites

Answer 3

receives messages

Question 4

Axon

Answer 4

passas messages from body cells to other neurons

Question 5

Myelin sheath

Answer 5

covers the axon of some neurons; helps speed neural impulses

Question 6

Glial cells

Answer 6

support, nourish, and protect neurons; effect learning, thinking, and memory

Question 7

Action potential

Answer 7

a breif electrical charge the travels down the axon. it sends messages by firing an impulse

Question 8

Threshold

Answer 8

the value at which a neuron will fire, or activate, based on the input it receives

Question 9

Refractory period

Answer 9

the recovery time that a neuron needs between action potentials

Question 10

All-or-none response

Answer 10

the strength of a response of a nerve cell or muscle fiber is not dependent upon the strength of the stimulus

Question 11

Synapse

Answer 11

the meeting between neurons