ANATOMY
GASTRO INTESTINAL
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Stimulate Gastric Acid and pepsin secretion
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Growth of gastric mucosa and intestinal mucosa
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Stimulate Gastric Motility
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Contraction of muscle at gastro esophageal junction cardiac sphincter prevents reflux
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Detailed explanation-1: -The gastrointestinal polypeptide gastrin, found in great abundance in the gastric antrium, was shown in 1970 to have a very dramatic effect in stimulating the smooth muscle segment of the lower esophageal sphincter (LES), and in causing marked increases in pressure in this region.
Detailed explanation-2: -These studies show: a) gastrin does not cause sphincter contraction by stimulating cholinergic neurons: and b) gastrin does not exert an inhibitory effect on the sponcter pressure by stimulating H2 receptors. We suggest that gastrin may contract the lower esophageal sphincter by a direct action on the sphincter muscle.
Detailed explanation-3: -The primary function of the esophagus is to transport food entering the mouth through the throat and into the stomach.
Detailed explanation-4: -Constriction of the upper and lower esophageal sphincters helps to prevent reflux (backflow) of gastric contents and acid into the esophagus, protecting the esophageal mucosa.