The Exhalation of Air from Human Lungs is Driven By

Question

The exhalation of air from human lungs is driven by
A) a decrease in the volume of the thoracic cavity.
B) a decrease in the residual volume of the lungs.
C) the contraction of the diaphragm.
D) the closure of the epiglottis.
E) the expansion of the rib cage.

Accepted Answer

The exhalation of air from human lungs is driven by a decrease in the volume of the thoracic cavity, which is achieved through the relaxation of the diaphragm and the intercostal muscles. As the volume of the thoracic cavity decreases, the pressure within the cavity increases, forcing air out of the lungs.