Question

How is a myelinated never fiber different from the non-myelinated nerve fiber?

Answer 1

Nerve fibers in the nervous system are either myelinated non-myelinated. The axis cylinder of the myelinated nerve fibers, in comparison to that of non-myelinated nerve fibers, is surrounded by a myelin sheath. Myelin sheath, derived from Schwann cell, is composed of lipids and proteins. Myelin sheath at regular intervals is interrupted by Nodes of Ranvier. Myelin sheath acts as an insulator, thus the signal transmission through nerve fibers occurs only at nodes of Ranvier. Thus the speed of signal transmission is high in myelinated nerve fibers than in non-myelinated nerve fibers.