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Question 9254
NEET Biology · Medium

Breathing and Exchange of Gases: Airflow MCQ

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

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AirflowMediumQuestion 9254

Question

Air leaves the lungs during expiration because intrapulmonary pressure becomes:

  1. A
    Higher than atmospheric pressure
    Correct
  2. B
    Lower than venous pressure only
  3. C
    Equal to oxygen pressure in blood only
  4. D
    Zero in all alveoli

Correct answer

Higher than atmospheric pressure

Explanation

Expiration requires the pressure inside lungs to exceed atmospheric pressure slightly.

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