Chapter 3 - Neurons

Question 1

Dendrites

Answer 1

receive chemical messages from other neurons

Question 2

Cell Body (soma)

Answer 2

collects neural impulses, contains the cell nucleus, and provides life-sustaining functions for the cell

Question 3

Axon

Answer 3

transports electrical impulses to other neurons via the terminal branches

Question 4

Terminal Branches

Answer 4

converts electrical impulses into chemical messages to other neurons

Question 5

Myelin Sheath

Answer 5

a layer of fatty tissue that covers and insulates an axon to ensure that electrical messages fast and meet less resistance

Question 6

Glia

Answer 6

cells that make up the myelin sheath around neurons to insulate, support, and nourish neurons

Question 7

Action Potential

Answer 7

When stipulated with sufficient energy, neurons “fire” an electrical impulse

Question 8

Ion Channels

Answer 8

channels that allow chemical ions to enter and exit the neuronal membrane to generate voltage

Question 9

Depolarization

Answer 9

when a neuron’s voltage becomes more positive; first phase of action potential