Chapter 4: The Nervous System

Question 1

1. Bundles of neurons in the CNS are called ______.
2. The cell bodies are clustered in groups called _______.
3. They carry _______ type of information.

Answer 1

1. Tracts
2. Nuclei
3. Only one type of information (either S or M)

Question 2

1. Bundles of neurons in the PNS are called ______.
2. The cell bodies are clustered in groups called _______.
3. They carry _______ type of information.

Answer 2

1. Nerves
2. Ganglia
3. Either S, M, or both types of information.

Question 3

Glial cells

Answer 3

Play both structural and supportive roles in the NS.

Question 4

Astrocytes

Answer 4

nourish neurons and form the blood–brain barrier, which controls
the transmission of solutes from the bloodstream into nervous tissue.

Question 5

Ependymal cells

Answer 5

Line the ventricles of the brain and produce cerebrospinal fluid, which physically supports the brain and serves as a shock absorber.

Question 6

Microglia

Answer 6

Are phagocytic cells that ingest and break down waste products and pathogens in the central nervous system.

Question 7

Oligodendrocytes (CNS) and Schwann cells (PNS)

Answer 7

Produce myelin around axons.