Module 3 glossary terms

Question 1

axon transport

Answer 1

movement of material between the axon terminal and cell body of a neuron.

Question 2

central nervous system

Answer 2

the brain and the spinal cord

Question 3

gated ion channels

Answer 3

an ion channel that opens and closes in response to stimuli.

Question 4

graded potential

Answer 4

a change in membrane potential whose magnitude is proportional to the stimulus and that decreases with distance as it spreads through the cytoplasm.

Question 5

gila

Answer 5

non-neuronal support cells in the nervous system.

Question 6

myelin

Answer 6

concentric layers of cell membrane that wrap around and insulate axons of neurons.

Question 7

nerves

Answer 7

a collection of axons from multiple neurons.

Question 8

neuron

Answer 8

a specialized cell capable of generating and transmitting electrical signals

Question 9

peripheral nervous system

Answer 9

all neurons that lie completely or partially outside the central nervous system.