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A drop in pH below 4.5 in the duodenum stimulates the secretion of (a) secretin, (b) cholecystokinin, (c) gastrin, (d) all of these.
23. The Digestive System
Introduction to the Digestive System
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1:34 minutesOpen Question
Multiple ChoiceMore than one choice may apply.A digestive organ that is not part of the alimentary canal is thea. stomach.b. liver.c. small intestine.d. large intestine.e. pharynx.
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