Which Lung Volume Keeps the Lungs from Completely Deflating, Even

Question

Which lung volume keeps the lungs from completely deflating, even after a maximal exhalation?
A) vital capacity
B) total capacity
C) residual volume
D) tidal volume

Accepted Answer

Residual volume is the amount of air that remains in a person's lungs after fully exhaling. It prevents the lungs from collapsing by maintaining a constant volume of air within the lungs at all times.