Nervous System

Question 1

The two major regions of the nervous system:

Answer 1

central and peripheral

Question 2

what does the central nervous system consist of?

Answer 2

Spinal cord, brain

Question 3

4 types of glial cells:

Answer 3

astrocytes
oligodendrocytes
microglia
ependymal cells

Question 4

Difference between grey matter and white matter:

Answer 4

grey: regions with many cell bodies and dendrites
white: regions with many axons

Question 5

What is the somatic nervous system?

Answer 5

responsible for conscious perception and voluntary motor responses, some of which are reflexes

Question 6

What is the autonomic nervous system?

Answer 6

-responsible for involuntary control of the body -homeostasis (regulating organ systems)
-controls smooth muscle and glandular tissue

Question 7

What is a neuron?

Answer 7

-basis of nervous tissue
-responsible for electrical signals that communicate sensory information
-responsible for reactions to sensory information

Question 8

The axon:

Answer 8

propagates the nerve impulse

Question 9

the dendrite:

Answer 9

receives the nerve impulse at the synapses

Question 10

What are axons wrapped in?

Answer 10

insulating lipid substance called myelin

Question 11

nodes of Ranvier:

Answer 11

are the gaps in the myelin sheath