Respiratory 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 · Respiratory physiology

Sample item

What is tidal volume?

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

The answer and the reasoning

D. Air moved in a normal quiet breath

Tidal volume is the amount of air inspired or expired during a normal quiet respiratory cycle, excluding the extra reserve volumes.

Option by option

  • A. Dead space only

    Dead space is ventilated volume that does not exchange gas effectively.

  • B. Maximum inspired volume

    Maximum inspired volume is closer to total lung capacity or inspiratory capacity depending context.

  • C. Air left after forced expiration

    Air left after forced expiration is residual volume.

  • D. Air moved in a normal quiet breath (correct)

    Correct: tidal volume is air moved in an ordinary quiet breath.

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, Air moved in a normal quiet breath. Tidal volume is the amount of air inspired or expired during a normal quiet respiratory cycle, excluding the extra reserve volumes.

Why is "Dead space only" not the answer?

Dead space is ventilated volume that does not exchange gas effectively.

Why is "Maximum inspired volume" not the answer?

Maximum inspired volume is closer to total lung capacity or inspiratory capacity depending context.

Why is "Air left after forced expiration" not the answer?

Air left after forced expiration is residual volume.

What concept does this question test?

It tests Respiratory physiology in Physiology. The correct option holds because: Correct: tidal volume is air moved in an ordinary quiet breath.

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 Respiratory 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.