If the Epithelium That Lines the Air Sacs of Your

Multiple Choice

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.