Breathing and Exchange of GasesHard

Question

Lungs do not collapse between breaths and someair always remains in the lungs which can never be expelled because

Options

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 is higher than the atmospheric pressure

Solution

Lungs do not collapse between breaths and some air always remains in the lung which can never be expelled because there is a negative intrapleural

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