Which of the following promotes elastic recoil of the lungs?
A) elastic fibers in the lung.
B) surface tension of the fluid lining the alveoli.
C) pulmonary surfactant.
D) both (a) and (b) above.
E) all of these answers.

Question

Quizplus · Accepted Answer

Elastic fibers in the lung and surface tension of the fluid lining the alveoli both contribute to the elastic recoil of the lungs. Elastic fibers allow the lungs to stretch and return to their normal shape during breathing, while surface tension helps to prevent the alveoli from collapsing. Pulmonary surfactant is important for reducing surface tension and preventing alveolar collapse, but it does not directly promote elastic recoil. Therefore, the correct answer is (D) both (a) and (b) above.

Which of the Following Promotes Elastic Recoil of the Lungs