Topic 19: Nervous System - Cell Types - Glial Cells

Question 1

What is the function of neuroglia cells? (2)

Answer 1

• support neurons
• can undergo mitosis (prone to cancer)

Question 2

What are the 4 types of glial cells in the CNS?

Answer 2

1. Oligodendrocytes
2. Microglia
3. Astrocytes
4. Ependymal
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Question 3

what are oligodendrocytes?

Answer 3

• produce myelin around axon

Question 4

what are microglia? (2)

Answer 4

• protective
• become phagocytic if detect infected, dead, or damaged neurons (since immune cells cannot enter CNS)

Question 5

What are astrocytes? (2)

Answer 5

• surround blood capillaries to form part of blood brain barrier (BBB)
• help control capillary permeability

Question 6

What type of tissue does the ependymal cells have?

Answer 6

neural epithelia

Question 7

What is the function of ependymal cells? (2)

Answer 7

• lines brain ventricles and central canal of the spinal cord
• secretes cerebrospinal fluid and circulates it (cilia)

Question 8

What two glial cells are in the PNS? (2)

Answer 8

• Schwann cells
• Satellite Cells

Question 9

What do schwann cells form?

Answer 9

• myelin around axons in PNS

Question 10

What do satellite cells surround?

Answer 10

• neuron cell bodies in ganglia for protection and support