Cardiovascular 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 · Cardiovascular physiology

Sample item

What reflex increases heart rate after sudden arterial pressure fall?

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

The answer and the reasoning

A. Baroreceptor reflex

Reduced carotid-sinus and aortic-arch firing during hypotension increases sympathetic output, raising heart rate, contractility, and vascular tone.

Option by option

  • A. Baroreceptor reflex (correct)

    Correct: baroreceptors provide rapid BP feedback.

  • B. Stretch reflex

    Stretch reflex regulates muscle length.

  • C. Pupillary light reflex

    Pupil reflex controls iris response.

  • D. Gag reflex

    Gag reflex protects airway.

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 A, Baroreceptor reflex. Reduced carotid-sinus and aortic-arch firing during hypotension increases sympathetic output, raising heart rate, contractility, and vascular tone.

Why is "Stretch reflex" not the answer?

Stretch reflex regulates muscle length.

Why is "Pupillary light reflex" not the answer?

Pupil reflex controls iris response.

Why is "Gag reflex" not the answer?

Gag reflex protects airway.

What concept does this question test?

It tests Cardiovascular physiology in Physiology. The correct option holds because: Correct: baroreceptors provide rapid BP feedback.

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 Cardiovascular 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.