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Question 9270
NEET Biology · Hard

Breathing and Exchange of Gases: Measurement MCQ

Solve this quality-checked NEET multiple-choice question, then review the correct answer and explanation.

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MeasurementHardQuestion 9270

Question

Why can residual volume not be obtained directly by simple spirometry?

  1. A
    Because it is not expelled from lungs
    Correct
  2. B
    Because it is too rich in CO2
  3. C
    Because it has no oxygen
  4. D
    Because it exists only during sleep

Correct answer

Because it is not expelled from lungs

Explanation

Spirometry records air moving in and out; residual volume stays behind and cannot be exhaled voluntarily.

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