[Secretion and excretion in the stomach exposed to hypoxia]

Secretion of gastric juice, pepsin, hydrochloric acid, ammonia, visible mucus and mucin, and exogenous neutral red was studied in intact dogs and in those subjected to hypoxia in a pressure chamber by rarefaction corresponding to an altitude of 7000 m. Hypoxia led to depressed secretion of pepsin, hydrochloric acid and neutral red together with a reduction in gastric juice secretion. Secretion of visible mucus and mucin was activated, whereas excretion of ammonia remained unchanged.