The myelin sheath that covers many CNS axons is formed by
A) astrocytes.
B) satellite cells.
C) oligodendrocytes.
D) microglia.
E) ependymal cells.

Question

Quizplus · Accepted Answer

The myelin sheath in the CNS is formed by oligodendrocytes. These cells extend processes that wrap around axons to form multiple layers of myelin, which insulate and protect the axons. Astrocytes, satellite cells, microglia, and ependymal cells do not form myelin in the CNS.

The Myelin Sheath That Covers Many CNS Axons Is Formed