In the central nervous system, myelin is made by the astrocytes.

• A. True
• B. False
• C. Not sure
• D. Some say

Answer: (B)

Myelination in the central nervous system is carried out by oligodendrocytes, not astrocytes. Oligodendrocytes extend their processes to multiple axons and wrap segments with myelin, forming the insulating sheath that speeds electrical conduction. Astrocytes, while essential for support, nutrient transport, and maintaining the blood-brain barrier, do not create myelin. In the peripheral nervous system, myelin is produced by Schwann cells. So, the statement is false.