Describe the control of gastric emptying.

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College Answer

The main points expected for a pass were:

  • An appreciation that the aim of controlling gastric emptying is to present the food to the small bowel for absorption in a controlled manner e That there are both gastric neural and hormonal mechanisms e.g.
  • Gastric volume and the hormone gastrin
  • There are duodenal neural and hormonal mechanisms e.g. composition of the chyme, secretin and cholecystokinin and the influence of duodenal distension.

Extra points were given for mentioning the effect of sympathetic stimulation and pregnancy on gastric emptying

Common problems were not enough knowledge, naming hormones but not saying what their action was and including drugs.