PATHOLOGY

PATHOLOGY MCQ

NERVOUS SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the insulator covering the axon which helps the impulse travel?
A
cell body
B
dendrite
C
myelin sheath
D
synapse
Explanation: 

Detailed explanation-1: -Myelin is an insulating layer, or sheath that forms around nerves, including those in the brain and spinal cord. It is made up of protein and fatty substances. This myelin sheath allows electrical impulses to transmit quickly and efficiently along the nerve cells. If myelin is damaged, these impulses slow down.

Detailed explanation-2: -The myelin sheath acts as an insulator which prevents short-circuiting in the neurons. The small gaps present in the myelin sheath is known as Nodes of Ranvier. The main purpose of the Myelin sheath is to act like an insulation and avoid the mixing of impulses in the adjacent axons.

There is 1 question to complete.