Question

question 3
microglia:
a form myelin sheaths
b are part of the choroid plexus
c produce cerebrospinal fluid
d are part of the blood - brain barrier
e are phagocytic cells in the cns

Explanation:

Microglia are a type of glial cell in the central nervous system (CNS). They are phagocytic cells, which means they can engulf and remove debris, pathogens, and dead cells.

• Option A: Oligodendrocytes (in CNS) and Schwann cells (in PNS) form myelin sheaths, not microglia.
• Option B: Ependymal cells are part of the choroid plexus.
• Option C: Ependymal cells produce cerebrospinal fluid.
• Option D: Endothelial cells of blood vessels along with astrocytes are part of the blood - brain barrier.
• Option E: Microglia act as the immune - defense cells of the CNS and are phagocytic.

Answer:

E. are phagocytic cells in the CNS