NEET Previous Year Question
Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because
Topic: NEET PYQ
Answer: A. Full step-by-step solution below.
- AThere is a negative intrapleural pressure pulling at the lung walls
- BThere is a positive intrapleural pressure
- CPressure in the lungs is higher than the atmospheric pressure
- DThere is a negative pressure in the lungs
Correct answer: A
Solution
(a) Negative intrapleural pressure keeps the lungs expanded and prevents their collapse. Some air remains in lungs as residual volume even after forceful expiration.More Breathing & Exchange of Gases PYQs
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