Alveoli are kept clean by the action of
A)surfactant.
B)antibodies.
C)macrophages.
D)platelets.

Question

Quizplus · Accepted Answer

Macrophages are a type of white blood cell that are present in the alveoli of the lungs. They are responsible for phagocytosing and removing debris, dust, and pathogens from the alveoli to keep them clean and functioning properly. Surfactant helps to reduce the surface tension in the alveoli, but it is not directly involved in keeping them clean. Antibodies and platelets are not typically found in the alveoli, so they are not involved in keeping them clean either.

Alveoli Are Kept Clean by the Action of