NERVOUS
NEUROGLIA
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Choose the correct statement regarding saltatory conduction.
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Slow conduction.
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Occurs in myelinated axons.
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Conduction also occurs in the myelin sheath.
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Action potential occurs only at the nodes of Ranvier
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Explanation:
Detailed explanation-1: -Because the myelin sheath is largely composed of an insulating fatty substance, the nodes of Ranvier allow the generation of a fast electrical impulse along the axon. This rapid rate of conduction is called saltatory conduction.
Detailed explanation-2: -Saltatory conduction occurs widely in the myelinated nerve fibers of vertebrates, but was later discovered in a pair of medial myelinated giant fibers of Fenneropenaeus chinensis and Marsupenaeus japonicus shrimp, as well as in a median giant fiber of an earthworm.
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