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.

Try it

Physiology · Cardiovascular physiology

Sample item

Which structure normally acts as the heart's primary pacemaker?

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

The answer and the reasoning

D. Sinoatrial node

The relevant Cardiovascular physiology principle makes Sinoatrial node the best answer because it directly explains the structure or physiological response in the stem.

Option by option

  • A. Bundle branches

    Bundle branches is associated with a different anatomical or physiological role.

  • B. Atrioventricular node

    Atrioventricular node does not correspond to the structure or response being tested.

  • C. Purkinje fibers

    Purkinje fibers is not supported by the key clue provided in this item.

  • D. Sinoatrial node (correct)

    Correct. Sinoatrial node directly follows from the core cardiovascular physiology 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 D, Sinoatrial node. The relevant Cardiovascular physiology principle makes Sinoatrial node the best answer because it directly explains the structure or physiological response in the stem.

Why is "Bundle branches" not the answer?

Bundle branches is associated with a different anatomical or physiological role.

Why is "Atrioventricular node" not the answer?

Atrioventricular node does not correspond to the structure or response being tested.

Why is "Purkinje fibers" not the answer?

Purkinje fibers is not supported by the key clue provided in this item.

What concept does this question test?

It tests Cardiovascular physiology in Physiology. The correct option holds because: Correct. Sinoatrial node directly follows from the core cardiovascular physiology relationship.

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.