MCQ A.3.5. – BasicPhysiology.org

Created on April 03, 2023 By

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MCQ A.3.5.

A.3.5. Saltatory Propagation

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In saltatory propagation:

The propagation of the nerve action potential only occurs in one direction

The propagation of the nerve action potential occurs in both directions

The propagation of the nerve action potential occurs in small steps

The propagation of the nerve action potential occurs in large steps

The propagation of the nerve action potential occurs back and forth

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What would happen if, in myelinated axons, the distance between successive nodes of Ranvier was increased?

The velocity of saltatory propagation would increase

The velocity of saltatory propagation would decrease

The velocity of saltatory propagation would increase up to the point that the intra- and extracellular current flow would no longer depolarize the next membrane patch to threshold. In that case, the propagation would stop

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What is the function of the myelin sheath in the process of saltatory propagation?

To isolate a patch of the nerve membrane which forces the extracellular current flow to depolarize a non-myelinated patch of membrane further away

To isolate a patch of the nerve membrane which forces the intracellular current flow to depolarize a non-myelinated patch of membrane further away

To isolate a patch of the nerve membrane which forces the intracellular current flow to depolarize a non-myelinated patch of membrane closer to the previous action potential

To isolate a patch of the nerve membrane which forces the extracellular current flow to depolarize a non-myelinated patch of membrane closer to the previous action potential

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