PHYSIOLOGY
CENTRAL NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The part of the neuron that insulates the axon and increases the speed of the neural message within the neuron.
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Synapse
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Dendrite
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Myelin Sheath
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Axon Terminal Button
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Explanation:
Detailed explanation-1: -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.
Detailed explanation-2: -The myelin sheath is a greatly extended and modified plasma membrane wrapped around the nerve axon in a spiral fashion [1]. The myelin membranes originate from and are a part of the Schwann cells in the peripheral nervous system (PNS) and the oligodendroglial cells in the central nervous system (CNS) (see Chap. 1).
Detailed explanation-3: -Axons are wrapped by layers of myelin, which serve as insulation to increase the speed of signals relayed by neurons.
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