Although there are several molecular or morphological differences between nerve fibers in the PNS and CNS, the basic myelin sheath arrangement and the electrophysiological characteristics are ...
A bundle of neurones is called a nerve. There are three main types of ... which is insulated by a fatty (myelin) sheath. They are long so they can carry messages up and down the body.
The nerve cell is covered with a fatty sheath, which insulates the nerve cell and speeds up the nerve impulse. Muscle cells contain filaments of protein that slide over each other to cause muscle ...