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.

Try it

Physiology · Neurophysiology

Sample item

What ion efflux primarily repolarizes a typical neuronal action potential?

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

The answer and the reasoning

C. Potassium efflux

The core Neurophysiology relationship supports Potassium efflux; it is the response that directly accounts for the structural location or physiological change described.

Option by option

  • A. Chloride efflux

    Chloride efflux is not consistent with the key finding in the stem.

  • B. Calcium influx

    Calcium influx does not fulfill the structural or functional role requested.

  • C. Potassium efflux (correct)

    Correct. Potassium efflux is directly supported by the central clue.

  • D. Sodium influx

    Sodium influx is associated with a different neurophysiology relationship.

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 C, Potassium efflux. The core Neurophysiology relationship supports Potassium efflux; it is the response that directly accounts for the structural location or physiological change described.

Why is "Chloride efflux" not the answer?

Chloride efflux is not consistent with the key finding in the stem.

Why is "Calcium influx" not the answer?

Calcium influx does not fulfill the structural or functional role requested.

Why is "Sodium influx" not the answer?

Sodium influx is associated with a different neurophysiology relationship.

What concept does this question test?

It tests Neurophysiology in Physiology. The correct option holds because: Correct. Potassium efflux is directly supported by the central clue.

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.