A Group of Researchers Is Looking into Why People Who

question 330

Multiple Choice

A group of researchers is looking into why people who have had a gastrectomy lose more weight than can be explained by dietary changes alone. They recruit several subjects for a clinical study who have had distal gastrectomy for benign gastric-outlet obstruction. Control subjects with similar baseline weights are also enrolled and instructed to follow a diet similar to the postgastrectomy subjects during the study period. In both groups, plasma levels of several hormones are measured serially over a 24-hour period. Levels of one of the hormones are shown in the graph below: This profile most likely represents which of the following hormones?

• A)Cholecystokinin
• B)Gastrin
• C)Ghrelin
• D)Insulin
• E)Leptin
• F)Motilin

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