The pressure that normally is less than atmospheric pressure is the pressure in the
A) alveoli of the lungs
B) pleural cavity or space
C) nasal cavities
D) upper respiratory passages
E) lower respiratory passages

Question

Quizplus · Accepted Answer

The pleural cavity or space is the only option where the pressure is normally less than atmospheric pressure. In this space, the pressure is negative, which helps to keep the lungs inflated. The other options either have atmospheric pressure or higher than atmospheric pressure.

The Pressure That Normally Is Less Than Atmospheric Pressure Is