As a molecule of oxygen passes from alveolar air into the blood it passes through the layers of the respiratory membrane in what order?
1) epithelial basement membrane
2) capillary basement membrane
3) alveolar epithelial wall
4) capillary endothelial wall
A) 3, 1, 2, 4
B) 4, 3, 2, 1
C) 1, 3, 2, 4
D) 3, 1, 4, 2

Question

As a molecule of oxygen passes from alveolar air into the blood it passes through the layers of the respiratory membrane in what order? 
1) epithelial basement membrane
2) capillary basement membrane
3) alveolar epithelial wall
4) capillary endothelial wall
A) 3, 1, 2, 4
B) 4, 3, 2, 1
C) 1, 3, 2, 4
D) 3, 1, 4, 2

Quizplus · Accepted Answer

The correct order in which a molecule of oxygen passes from alveolar air into the blood through the layers of the respiratory membrane is: alveolar epithelial wall, epithelial basement membrane, capillary basement membrane, and capillary endothelial wall.

As a Molecule of Oxygen Passes from Alveolar Air into the Blood