Question

Which of the following describes the proper order of structures that a carbon dioxide molecule diffuses through after leaving the blood?

A. Alveolar space; surfactant layer; capillary wall
B. Capillary wall; alveolar space; surfactant layer
C. Alveolar space; capillary wall; surfactant layer
D. Capillary wall; surfactant layer; alveolar space

Answer 1

D. Capillary wall; surfactant layer; alveolar space