Lecture 3: Glial Cells And Intro To The BBB

Question 1

Do most cells of the brain originate from the ectoderm, mesoderm or endoterm?

Answer 1

The ectoderm.

Question 2

Which is the only glial cell that doesn’t originate from the ectoderm? And where does it originate from?

Answer 2

Microglial cells. The originate from the mesoderm.

Question 3

What are the two types of glial cells of the PNS?

Answer 3

Schwann cells and satellite cells.

Question 4

Which type of myelinating glial cell can cover many axonal internodes and which can only cover one segment?

Answer 4

Oligodendrocytes can myelinate many axonal nodes of many axons.
Schwann cells myelinate only one axonal node.

Question 5

What are the two types of astrocytes?

Answer 5

Fibrous and protoplasmic.

Question 6

Which type of astrocyte is present in white matter and which is present in grey matter?

Answer 6

Fibrous type is present in white matter and protoplasmic type is present in grey matter.

Question 7

Which type of astrocyte contains more organelles?

Answer 7

Protoplasmic astrocyte.

Question 8

Which glial cells take up extra neurotransmitter and potassium at the synapse?

Answer 8

Astrocytes.