During Inspiration, the Expansion of the Lungs Causes

Question

During inspiration, the expansion of the lungs causes:
A)cohesion of visceral and parietal pleura.
B)a pressure gradient from alveoli to atmosphere.
C)a decrease in alveolar pressure.
D)an increase in intrathoracic pressure from about -6 to -4 mm Hg.

Accepted Answer

During inspiration, the expansion of the lungs causes a decrease in alveolar pressure, creating a pressure gradient that allows air to flow into the lungs.