A transmural pressure gradient exists across the lung wall because the ____ pressure is less than the ____ pressure.
A) intrapleural, intra-alveolar.
B) intra-alveolar, intrapleural.
C) intrapleural, atmospheric.
D) atmospheric, intra-alveolar.
E) none of these answers.

Question

Quizplus · Accepted Answer

The transmural pressure gradient exists because the intrapleural pressure is less than the intra-alveolar pressure, creating a pressure difference that keeps the lungs expanded.

A Transmural Pressure Gradient Exists Across the Lung Wall Because