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

Why does skeletal-muscle blood flow rise during exercise?

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

The answer and the reasoning

C. Local metabolites dilate arterioles

Active muscle releases metabolites such as carbon dioxide, hydrogen ions, potassium, and adenosine that locally dilate arterioles despite sympathetic activity.

Option by option

  • A. Haemoglobin leaves red cells

    Haemoglobin remains in erythrocytes.

  • B. Venous valves pump arterial blood

    Venous valves affect venous return.

  • C. Local metabolites dilate arterioles (correct)

    Correct: local metabolic control increases active-muscle perfusion.

  • D. Sympathetic nerves constrict all muscle vessels

    Sympathetic vasoconstriction is overridden locally.

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, Local metabolites dilate arterioles. Active muscle releases metabolites such as carbon dioxide, hydrogen ions, potassium, and adenosine that locally dilate arterioles despite sympathetic activity.

Why is "Haemoglobin leaves red cells" not the answer?

Haemoglobin remains in erythrocytes.

Why is "Venous valves pump arterial blood" not the answer?

Venous valves affect venous return.

Why is "Sympathetic nerves constrict all muscle vessels" not the answer?

Sympathetic vasoconstriction is overridden locally.

What concept does this question test?

It tests Exercise physiology in Physiology. The correct option holds because: Correct: local metabolic control increases active-muscle perfusion.

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.