Which of the following are components of the diffusion path?
I.Capillary endothelium
II.Intracellular fluid bathing the hemoglobin molecule
III.Red blood cell membrane
IV.Alveolar epithelium
V.Surfactant layer lining the alveolar surface

Question

Quizplus · Accepted Answer

The total diffusion path distance is normally less than 0.1 µ and includes the following (see Figure 7-1): 
(1) the surfactant layer that is lining the alveolar surface, 
(2) the alveolar epithelium, 
(3) the basement membrane of the alveolar epithelium, 
(4) an extremely thin interstitial space, 
(5) the basement membrane of the capillary endothelium, 
(6) the capillary endothelium, 
(7) plasma, 
(8) the red blood cell membrane, and 
(9) intracellular fluid bathing the hemoglobin molecule.

Which of the Following Are Components of the Diffusion Path