Gastric secretion as a function of acute and chronic stress in the gastric fistula rat.

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Abstract
In Experiment 1 rats exposed to signaled and unsignaled grid shock secreted more gastric acid after shock stress (chronic stress) for 8 days compared to the first 12 hr. of shock stress (acute stress). However, Experiment 2 indicated that the higher gastric acid values under chronic stress were not significantly greater than prestress baseline values. The results are interpreted to reflect an inhibition of gastric acid secretion as a function of acute stress. During chronic stress this inhibition is followed by a habituation of gastric secretory processes which is observed as a return of secretion volume to baseline levels.