The surface of the stomach is lined with differentiated cells called surface mucous cells. These cells produce a thick mucus that coats the epithelium on the inside surface of
the stomach. Why is it necessary for the differentiated cells to produce a mucus coating?
A It allows the epithelium to aid in the process of digestion.
BOIt protects the epithelium from the acid content of the stomach.
CO It causes the epithelium to expand as food enters the stomach.
D. It traps nutrients inside the epithelium as food passes through the stomach.