PHYSIOLOGY
CENTRAL NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Which part of the neuron is a fatty layer that insulates the axon and sometimes a dendrite?
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Cell body
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Dendrites
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Axon
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Myelin sheath
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Explanation:
Detailed explanation-1: -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-2: -Sometimes the axons of the neurons are covered by a myelin sheath which helps in faster conduction.
Detailed explanation-3: -The myelin sheath is a layer of fatty tissue surrounding the axon of a neuron that both acts as an insulator and allows faster transmission of the electrical signal.
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