EMBRYOLOGY
NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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makes the signal travel faster
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protects the neuron
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carries the signal away from the cell body
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carries the signal to the cell body
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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: -Since myelin sheath provides insulation to axons, this allows these axons to conduct electrical signals at a higher speed than if they were not insulated by myelin. Thus, the more thoroughly myelinated an axon is, the higher the speed of electrical transmission.
Detailed explanation-3: -Nerve impulse flows more rapidly in Myelinated nerve fiber than in the Non-nucleated fibers. In myelinated fibers the nerve impulse jumps from one node of Ranvier to another, thus it is faster. However, the nerve impulse has to travel all along in the non-myelinated fibers.