Nervous System A&P (Exam 2)

Question 1

CNS Consist of

Answer 1

Brain and Spinal Cord

Question 2

PNS consist of

Answer 2

Cranial and Spinal nerves

Autonomic Nervous system

Question 3

What are the two types of cells in the nervous system?

Answer 3

Neurons

Neuroglia

Question 4

What is the primary functional unit of the nervous system?

Answer 4

Neuron

Question 5

Can neurons replicate?

Answer 5

No they do not divide or replace themselves

However, some new neurons may generate from stem cells after brain injury

Question 6

Can neuroglia replicate?

Answer 6

Yes

Question 7

The Neuron Consist of

Answer 7

Cell Body - Axon - Dendrite - Myelin Sheath

Question 8

Cell Body

Answer 8

Part of the neuron

Metabolic center of the neuron

Question 9

Dendrites

Answer 9

Short extensions from the body of the neuron that receive and conduct nerve impulses

Question 10

Axon

Answer 10

Extend varying distances from the cell body of the neuron and carry nerve impulses

Question 11

Myelin Sheath

Answer 11

White lipid substance that insulates and helps conduct the impulses

Question 12

Neuroglia (glial cell)

Answer 12

Provide support, nourishment, and protection to neurons

Make up almost half the brain and spinal cord

Question 13

What are more numerous glial cells or neurons?

Answer 13

glial cells

Question 14

Types of Neuroglia

Answer 14

Oligodendrocytes

Schwann cells

Astrocytes

Question 15

Oligodendrocytes

Answer 15

Produce the myelin sheath for nerve fibers in the CNS

Make up white matter of brain

Question 16

Schwann Cells

Answer 16

Myelinate the nerve fibers in the periphery

Question 17

Astrocytes

Answer 17

Provide structural support to neurons and form the blood-brain barrier

Question 18

Astrocytes are found in the

Answer 18

Gray matter