In the stomach

A. False  Values around pH 2–3 are normal.

B. True  Pepsin is the active proteolyic form of pepsinogen.

C. False  HCl reduces trivalent ferric iron to the divalent ferrous form in which it can be absorbed in the small intestine.

D. False  Pentagastrin is a powerful pharmacological stimulant of mucosal cells to produce HCl.

E. False  But it rises markedly after H2 blockade which blocks gastric acid secretion.