Which of the following respiratory membrane layers is closest to air in the alveolus?
A) Alveolar epithelium
B) Alveolar basement membrane
C) Capillary basement membrane
D) Capillary endothelium
E) Alveolar fluid (with surfactant)

Question

Quizplus · Accepted Answer

The alveolar fluid with surfactant is the layer that lines the alveoli and is in direct contact with the air inside the alveolus, making it the closest layer to the air.

Which of the Following Respiratory Membrane Layers Is Closest to Air