ANATOMY

GENERAL ANATOMY

NERVOUS SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
This is the protective covering over the axon of a neuron that helps to increase the speed an impulse (message) is transmitted (sent)
A
synapse
B
dendrites
C
cell body
D
Myelin sheath
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.

Detailed explanation-2: -The axon is covered by a myelin sheath. The axon passes information to the next neuron or other cell in the body. A myelin sheath. The axons have a protective covering called myelin.

Detailed explanation-3: -Most of the axons in the central nervous system are wrapped in myelin, a substance rich in lipids (fatty substances) and proteins. Like the coating around an electrical wire, myelin insulates and protects the axon and helps speed nerve transmission.

Detailed explanation-4: -Myelin can greatly increase the speed of electrical impulses in neurons because it insulates the axon and assembles voltage-gated sodium channel clusters at discrete nodes along its length. Myelin damage causes several neurological diseases, such as multiple sclerosis.

Detailed explanation-5: -Myelin has properties of low capacitance and high electrical resistance which means it can act as an insulator. Therefore, myelin sheaths insulate axons to increase the speed of electrical signal conduction. This allows myelinated axons to conduct electrical signals at high speeds.

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