Which CNS glial cell can wrap around multiple axons to provide myelination?

Which CNS glial cell can wrap around multiple axons to provide myelination?

• A. Schwann cells
• B. Astrocytes
• C. Oligodendrocytes
• D. Microglia

Answer: (C)

In the central nervous system, myelin is produced by oligodendrocytes. Each oligodendrocyte sends multiple projections that wrap around segments of several different axons, creating the insulating myelin sheaths that speed up nerve signaling through saltatory conduction. This contrasts with Schwann cells in the peripheral nervous system, which myelinate a single axon segment each. Astrocytes support neurons and maintain the environment, while microglia act as immune-like cells; neither forms myelin around multiple axons. So, the glial cell that can wrap around multiple axons to provide myelination is the oligodendrocyte.

In the central nervous system, myelin is produced by oligodendrocytes. Each oligodendrocyte sends multiple projections that wrap around segments of several different axons, creating the insulating myelin sheaths that speed up nerve signaling through saltatory conduction. This contrasts with Schwann cells in the peripheral nervous system, which myelinate a single axon segment each. Astrocytes support neurons and maintain the environment, while microglia act as immune-like cells; neither forms myelin around multiple axons. So, the glial cell that can wrap around multiple axons to provide myelination is the oligodendrocyte.