During exhalation, the pressure inside the lungs
A) initially is higher than atmospheric pressure, but drops as air leaves the body.
B) must be maintained higher than atmospheric pressure.
C) must be maintained lower than atmospheric pressure.
D) gradually elevates as air enters the lungs.
E) rapidly elevates.

Question

Quizplus · Accepted Answer

During exhalation, the pressure inside the lungs is initially higher than atmospheric pressure, which causes air to flow out of the lungs. As air leaves, the pressure drops until it equalizes with atmospheric pressure.

During Exhalation, the Pressure Inside the Lungs