What is the purpose of surfactant?
A) To reduce friction between the pleural membranes during inspiration and expiration
B) To provide a medium in which gas can dissolve
C) To gather any dust particles that have entered the lungs in inspired air
D) To reduce surface tension to keep the alveolus from collapsing during respiration

Question

Quizplus · Accepted Answer

The purpose of surfactant is to reduce surface tension in the alveoli and prevent them from collapsing during expiration. This allows for easier and more efficient gas exchange in the lungs.

What Is the Purpose of Surfactant