Question

Bicarbonate secretion________.A) neutralizes acid entering from the stomach into the duodenum.B) is secreted by apical Cl--HCO3-exchanger. C) is not dependent on high levels of carbonic anhydrase to maintain bicarbonate production. D) is secreted by the acinar cells.E) neutralizes acid entering from the stomach into the duodenum and is secreted by apical Cl--HCO3-exchanger.

Answer 1

Answer: The answer is neutralizes acid entering from the stomach into the duodenum.

Explanation: Bicarbonate secretion is a base and critical to neutralizing the acid coming into the small intestine from the stomach. This mechanism explain bicarbonate secretion is essentially the same as for acid secretion by parietal cells in the stomach and is dependent on the enzyme carbonic anhydrase.