Question

A major distinction between the central nervous system and the peripheral nervous system is that in the peripheral nervous system,

there are no neurons, only glial cells.

there are no nerves, only individual neurons.

neurons and parts of neurons are inside the brain and spinal cord.

neurons and parts of neurons are outside the brain and spinal cord.

Answer 1

when the peripheral nervous system is compared to cental nervous system, there are which much difference we observe. The CNS meant for information analysis and decision maker for a particular singal or stimulus. CNS is made up of mass of neurons along with glial cells(microglial, ependymal, oligodensrocytes, astrocytes). After this PNS is only a carrier of that signal to give relative action or response. Though the neurons are present in both CNS and PNS, the latter we observe sensory and Motor nerves seperately coming out of the brain and spinal cords. We can also observe a mixed kind of nerve where it is made up of both Sensory and Motor nerves. In PNS Glial cells are specialised as Schwann cells and satellite cells.