Which substance in the alveoli is responsible for lowering the surface tension?
A) pulmonary surfactant
B) mucus
C) saline
D) plasma

Question

Quizplus · Accepted Answer

Pulmonary surfactant is a substance produced by Type II alveolar cells that helps to lower the surface tension of the alveoli, preventing them from collapsing during exhalation. Mucus, saline, and plasma do not have this specific function in the alveoli.

Which Substance in the Alveoli Is Responsible for Lowering the Surface