If the epithelium that lines the air sacs of your lungs were to gain a layer of cells, which of the following would likely occur?
A)Oxygen will enter the lungs more quickly.
B)Oxygen will enter the lungs more slowly.
C)Secretion of mucus will increase.
D)Oxygen will enter at the same rate, because it is only the shape of the cells that matter.

Question

Quizplus · Accepted Answer

The addition of a layer of cells to the epithelium would decrease the surface area available for gas exchange, leading to a slower rate of oxygen entry into the lungs.

If the Epithelium That Lines the Air Sacs of Your