Question

Due to which of the following reason lungs do not collapse between breaths and some air always remains in the lungs which can never be expelled?

Options

• There is a positive intra-pleural pressure.

• There is a negative pressure in the lungs.

• There is a negative intra-pleural pressure pulling at the lung walls.

• Pressure in the lungs is higher than the atmospheric pressure.

Answer 1

There is a negative intra-pleural pressure pulling at the lung walls.