Select the correct statement about the physical factors influencing pulmonary ventilation.
A) A decrease in compliance causes an increase in ventilation.
B) A lung that is less elastic will require less muscle action to perform adequate ventilation.
C) As alveolar surface tension increases, additional muscle action will be required.
D) Surfactant helps increase alveolar surface tension.

Question

Quizplus · Accepted Answer

As alveolar surface tension increases, additional muscle action will be required. Surfactant actually helps decrease surface tension, making it easier for the lungs to inflate during inspiration. A decrease in compliance (ability of the lungs to stretch) would actually require more muscle action to perform adequate ventilation. A lung that is less elastic would require more muscle action to perform adequate ventilation as well.

Select the Correct Statement About the Physical Factors Influencing Pulmonary