Myelination of Axons in the Peripheral Nervous System …

Question

Myelination of axons in the peripheral nervous system …
A) is carried out by Schwann cells.
B) insulates the axons to reduce current leakage.
C) increases the speed of action potential propagation through saltatory conduction.
D) conserves energy because the active excitations are restricted to the nodes of Ranvier.
E) All of the above.

Accepted Answer

Myelin sheath is made by Schwann cells around axons in peripheral nerves; it insulates these axons, massively improves their conduction, and confines the "expensive" excitation mechanisms to interspersed nodes along the axon.