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 valve closes at the beginning of ventricular systole?

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

The answer and the reasoning

D. Atrioventricular valves

Ventricular pressure rises at the start of systole and closes the mitral and tricuspid valves, preventing blood from returning to the atria.

Option by option

  • A. Aortic valve only

    Aortic valve opens after ventricular pressure exceeds aortic pressure.

  • B. Coronary sinus valve

    Coronary sinus valve is not the valve event defining ventricular systole.

  • C. Pulmonary valve only

    Pulmonary valve opens after right ventricular pressure exceeds pulmonary artery pressure.

  • D. Atrioventricular valves (correct)

    Correct: mitral and tricuspid valves close at onset of systole.

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 D, Atrioventricular valves. Ventricular pressure rises at the start of systole and closes the mitral and tricuspid valves, preventing blood from returning to the atria.

Why is "Aortic valve only" not the answer?

Aortic valve opens after ventricular pressure exceeds aortic pressure.

Why is "Coronary sinus valve" not the answer?

Coronary sinus valve is not the valve event defining ventricular systole.

Why is "Pulmonary valve only" not the answer?

Pulmonary valve opens after right ventricular pressure exceeds pulmonary artery pressure.

What concept does this question test?

It tests Cardiovascular physiology in Physiology. The correct option holds because: Correct: mitral and tricuspid valves close at onset of systole.

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.