Epithelial cells are continually being shed from the intestinal villi because
A)the intracellular enzymes cause the cells to disintegrate and slough off
B)the body needs a continual supply of protein derived from the digestion of these cells
C)new cells are produced continually in the crypts and then they migrate upward
D)acid entering the small intestine constantly destroys the villi, causing the cells to slough
E)of factors other than those mentioned above

Question

Quizplus · Accepted Answer

The intestinal villi are lined with a single layer of epithelial cells, which are constantly being shed from the tips of the villi. This is a normal process of cell turnover, and new cells are continually produced in the crypts at the base of the villi. These new cells then migrate upward to replace the old, shedding cells at the tips of the villi. This turnover process helps to maintain the integrity and function of the intestinal lining.

Epithelial Cells Are Continually Being Shed from the Intestinal Villi