The nerve impulse which jumps from node to node in myelinated neurons is called as:
Correct answer: B. Saltatory nerve impulse
- A. Resting membrane potential
- B. Saltatory nerve impulse
- C. Threshold stimulus
- D. Initial nerve impulse
Explanation
Saltatory conduction describes how an electrical impulse skips from node to node down the full length of an axon, speeding the arrival of the impulse at the nerve terminal compared to the slower continuous progression of depolarization spreading down an unmyelinated axon.
This question appeared on the UHS MDCAT 2017 paper, which you can sit online with every answer explained.
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About Neurons and Nerve Impulse
Neurons receive and transmit information through dendrites, the cell body and axons. The topic explains resting potential, depolarization, repolarization, refractory periods and saltatory conduction, followed by synaptic transmission through neurotransmitters. An action potential is distinct from the graded potential produced at a receptor.
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