Lecture27: Neuroglia And Myelination

Question 1

What is the most common glial cells?

Answer 1

Astrocytes

Question 2

What are the precursors of the astrocytes?

Answer 2

The radial glial cells

Question 3

What is the shape of astrocytes?

Answer 3

They are large stellate cells

Question 4

Do astrocytes regulate K+ levels?

Answer 4

Yes

Question 5

What are Ependymal cells?

Answer 5

They are simple epithelial cells with microvilli

Question 6

What are microglial cells?

Answer 6

They are small with long spiny processes

Question 7

What do microglial cells do?

Answer 7

They act as macrophages during development and are inactive in adults

Question 8

What do Oligodendrocytes do?

Answer 8

Myelination in the CNS

Question 9

How do oligodendrocytes myelinate?

Answer 9

They wrap around the axons and form lipid bi-layers that acts as excellent myelin sheath and insulators

Question 10

What do Schwann cells do?

Answer 10

They are responsible for myelination in the PNS

Question 11

Diff between Schwann and Oligodendrocytes?

Answer 11

Schwann only myelinates one axon in the PNS