Which of the Following is Associated with the PNS but Not

Question

Which of the following is associated with the PNS but not the CNS?
A) Schwann cells
B) myelin sheath
C) axon
D) dendrite
E) node of Ranvier

Accepted Answer

Schwann cells are solely associated with the PNS, as they are responsible for producing myelin sheaths around peripheral axons. The myelin sheath itself is also associated with the PNS, but it is produced by both Schwann cells (in the PNS) and oligodendrocytes (in the CNS). Axons, dendrites, and nodes of Ranvier are all present in both the CNS and the PNS.