Epithelial Cells Are Continually Being Shed from the Villi Because

Multiple Choice

Epithelial cells are continually being shed from the villi because

A) the intracellular enzymes digest important cellular constituents, causing the cells to disintegrate and slough.
B) the body needs a continual supply of protein derived from the digestion of these cells.
C) new cells are continually being produced in the crypts at the base of the villi and migrate upward.
D) acid entering the small intestine from the stomach constantly destroys the small intestinal lining, causing the cells to slough.
E) none of these answers.