Membranes: 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 · Membranes

Sample item

Which pump maintains sodium and potassium gradients?

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

The answer and the reasoning

A. Na-K ATPase

This item reviews Membranes; Na-K ATPase is the best answer because it directly fits the anatomical or physiological relationship described.

Option by option

  • A. Na-K ATPase (correct)

    Correct. Na-K ATPase matches the defining feature.

  • B. H pump only

    H pump only is plausible but is not the best answer.

  • C. CFTR

    CFTR is not supported by the key finding.

  • D. Ca ATPase only

    Ca ATPase only does not match the stated 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 A, Na-K ATPase. This item reviews Membranes; Na-K ATPase is the best answer because it directly fits the anatomical or physiological relationship described.

Why is "H pump only" not the answer?

H pump only is plausible but is not the best answer.

Why is "CFTR" not the answer?

CFTR is not supported by the key finding.

Why is "Ca ATPase only" not the answer?

Ca ATPase only does not match the stated relationship.

What concept does this question test?

It tests Membranes in Physiology. The correct option holds because: Correct. Na-K ATPase matches the defining feature.

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 Membranes?

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.