The Collapse of Alveoli During Expiration Is Prevented by the

Multiple Choice

The collapse of alveoli during expiration is prevented by the

A) positive pressure in the pleural cavity
B) elastic recoil of the alveoli
C) thin film of serous fluid that lines the alveoli for lubrication
D) thin film of surfactant that lines the alveoli
E) cartilage that holds the alveoli open