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USMLE Exam Prep

Category - Free USMLE Practice Test Questions

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Gastrin plays an important role in digestion. Which of the following is not one of its roles?

Causes HCl release
Simulates motility
Stimulates hormone release
Inhibits Secretin

Explanation

Answer - D - Gastrin’s role in digestion includes causing HCl to be released from parietal cells, the simulation of antral motility, and the stimulation of hormone release. Secretin is released in the duodenum and inhibits the action of gastrin.

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