Ques. 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 is higher than the atmospheric pressure.
Answer:B
Ques. 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 is higher than the atmospheric pressure.