Are all axons covered with myelin? No; they can be either myelinated or unmyelinated. Myelinated axons are ensheathed along their entire length. The axon caliber (diameter) in mammalian PNS ranges ...

(B) Illustration of transverse section of myelinated axon at the internode. (C) Light microscopy of a mouse sciatic nerve at lower magnification. Toluidine blue staining. Myelin is stained in blue.

Neurons are cells in the body that are responsible for transmitting electrical signals through the nervous system. Different ...