What are the middle three layers (4-5-6)that an oxygen molecule must cross when moving from the alveoli into the blood?
A) interstitial space, basement membrane of the capillary endothelium, and the capillary endothelium
B) the liquid lining the intra-alveolar membrane, alveolar epithelial cell, and the basement membrane of the alveolar epithelial cell
C) interstitial space, basement membrane of the capillary endothelium, and the intracellular fluid of the erythrocyte
D) plasma of the capillary blood, the erythrocyte membrane, and the intracellular fluid in the erythrocyte.

Question

Quizplus · Accepted Answer

The middle three layers that an oxygen molecule must cross when moving from the alveoli into the blood are the interstitial space, basement membrane of the capillary endothelium, and the capillary endothelium. The interstitial space is the area between the alveoli and the capillary endothelium. The basement membrane of the capillary endothelium is a thin layer that separates the capillary from the interstitial space. The oxygen molecule then passes through the capillary endothelium, which is composed of a single layer of cells, to enter the capillary blood.

What Are the Middle Three Layers (4-5-6)that an Oxygen Molecule