Exercise physiology: 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 · Exercise physiology

Sample item

What limits maximal oxygen uptake during intense whole-body exercise in healthy adults?

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

The answer and the reasoning

C. Cardiac output and oxygen delivery to muscle

Maximal oxygen uptake depends strongly on the capacity to deliver oxygenated blood to exercising muscles, particularly cardiac output and arterial oxygen content.

Option by option

  • A. The amount of sodium in one meal

    A single meal's sodium content is not the main determinant.

  • B. The size of the gallbladder

    Gallbladder size is unrelated to aerobic capacity.

  • C. Cardiac output and oxygen delivery to muscle (correct)

    Correct: circulatory oxygen delivery is a central exercise limit.

  • D. Resting pupil diameter

    Pupil diameter does not limit muscle oxygen uptake.

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.

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Questions about this Physiology question

What is the answer to this Physiology question?

The best answer is C, Cardiac output and oxygen delivery to muscle. Maximal oxygen uptake depends strongly on the capacity to deliver oxygenated blood to exercising muscles, particularly cardiac output and arterial oxygen content.

Why is "The amount of sodium in one meal" not the answer?

A single meal's sodium content is not the main determinant.

Why is "The size of the gallbladder" not the answer?

Gallbladder size is unrelated to aerobic capacity.

Why is "Resting pupil diameter" not the answer?

Pupil diameter does not limit muscle oxygen uptake.

What concept does this question test?

It tests Exercise physiology in Physiology. The correct option holds because: Correct: circulatory oxygen delivery is a central exercise limit.

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 Exercise physiology?

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.