Which of the following does not directly assist in the exchange of gases between blood and the air?
A) Thin walls of the alveoli
B) Thin walls of the capillaries in the lung
C) Viscosity of the respiratory mucosa
D) Alveolar surface area

Question

Quizplus · Accepted Answer

Viscosity of the respiratory mucosa does not directly assist in the exchange of gases between blood and air. The thin walls of the alveoli and capillaries allow for quick diffusion, and the large surface area of the alveoli increases the efficiency of gas exchange.

Which of the Following Does Not Directly Assist in the Exchange