Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because
Lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled because
(a) there is a negative pressure in the lungs
(b) there is a negative intrapleural pressure pulling at the lung walls
(c) there is a positive intrapleural pressure
(d) pressure in the lungs in higher than the atmospheric pressure
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Correct Option (b) there is a negative intrapleural pressure pulling at the lung walls
Explanation:
Lungs do not collapse between breaths and some air always remains in the lungs which can be never expelled because there is a negative intrapleural pressure pulling at the lung walls adjacent lung alveoli. It generally occurs due to chronic cigarette smoking.
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