Parietal cells and their secretions are not involved in A)the absorption of vitamin B12. B)erythropoiesis. C)the release of bicarbonate into the stomach. D)activation of pepsinogen to pepsin. E)the release of bicarbonate into the blood.

Question

Quizplus · Accepted Answer

Parietal cells secrete hydrochloric acid (HCl) and intrinsic factor, which are involved in digestion and absorption of vitamin B12, and also activate pepsinogen to pepsin. However, they do not release bicarbonate into the stomach (the secretion of bicarbonate into the stomach is mediated by the gastric epithelium). Parietal cell secretion is not directly involved in erythropoiesis or the release of bicarbonate into the blood.

Parietal Cells and Their Secretions Are Not involved in