Which of the following cells secrete a myelin sheath?
A. Schwann cells
B. Adipocytes
C. Cartilage cells
D. Bone marrow cells
Answer:A
Which of the following cells secrete a myelin sheath?
A. Schwann cells B. Adipocytes C. Cartilage cells D. Bone marrow cells
Explanation: The myelinated nerve fibres are enveloped with Schwann cells, which form a myelin sheath around the axon. The gaps between the two adjacent myelin sheaths are called Nodes of Ranvier.