The myelin sheath that surrounds some axons in the peripheral nervous system is formed by
A) neurons.
B) Schwann cells.
C) bacteria that have invaded the nervous system.
D) synapses.
E) None of the above

Question

Quizplus · Accepted Answer

The myelin sheath in the peripheral nervous system is formed by Schwann cells, which wrap around the axon multiple times and create a sheath of insulating myelin. This helps to increase the speed of nerve signal transmission along the axon. Neurons, synapses, and bacteria do not form the myelin sheath.

The Myelin Sheath That Surrounds Some Axons in the Peripheral