Neurophysiology: practice question

A Physiology question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Physiology · Neurophysiology

Sample item

What feature allows saltatory conduction in myelinated nerves?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

B. Nodes of Ranvier

Nodes of Ranvier are gaps in myelin rich in voltage-gated sodium channels, allowing action potentials to appear to jump between nodes.

Option by option

  • A. Synaptic clefts only

    Synaptic clefts transmit signals between cells, not along a myelinated axon.

  • B. Nodes of Ranvier (correct)

    Correct: nodes of Ranvier enable saltatory conduction.

  • C. Cell nucleus

    The cell nucleus controls gene expression but does not propagate impulses.

  • D. Dendritic spines

    Dendritic spines mainly receive synaptic input on neurons.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

More Physiology questions

Questions about this Physiology question

What is the answer to this Physiology question?

The best answer is B, Nodes of Ranvier. Nodes of Ranvier are gaps in myelin rich in voltage-gated sodium channels, allowing action potentials to appear to jump between nodes.

Why is "Synaptic clefts only" not the answer?

Synaptic clefts transmit signals between cells, not along a myelinated axon.

Why is "Cell nucleus" not the answer?

The cell nucleus controls gene expression but does not propagate impulses.

Why is "Dendritic spines" not the answer?

Dendritic spines mainly receive synaptic input on neurons.

What concept does this question test?

It tests Neurophysiology in Physiology. The correct option holds because: Correct: nodes of Ranvier enable saltatory conduction.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Neurophysiology?

For each system, sketch the key graph (pressure–volume loop, oxygen dissociation curve, nephron handling) and explain it aloud. Then use the flashcards and the other Physiology questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.