Question

What type of glial cell supports and produces the myelin sheath in the PNS?

1) Astrocytes
2) Microglia
3) Oligodendrocytes
4) Schwann cells

Answer 1

Schwann cells are responsible for the production of the myelin sheath in the peripheral nervous system, by wrapping around a single axon segment.

Step-by-step explanation:

The type of glial cell that supports and produces the myelin sheath in the peripheral nervous system (PNS) is the Schwann cell. Schwann cells are distinct from oligodendrocytes, which myelinate neurons in the central nervous system (CNS). In the PNS, a Schwann cell wraps around a single axon segment to form the myelin sheath. This contrasts with oligodendrocytes in the CNS, where one cell can extend its processes to multiple axons.