Which layer of the small intestine wall contains cells with microvilli?
A. submucosa
B. mucosa
C. muscularis
D. serosa
E. adventitia
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Question 2) The villi, microvilli and plicae circularis function to
A. liberate hormones.
B. promote peristalsis.
C. produce bile.
D. increase surface area for absorption.
E. stimulate chemical digestion.
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Question 3) The pyloric pump
A. mixes stomach contents for digestion.
B. causes hunger contractions.
C. moves chyme through a partially closed pyloric opening.
D. causes rugae to flatten.
E. opens the pyloric sphincter completely.
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Question 4) Gastritis, peptic ulcers and gastric cancer can all be caused by
A. Helicobacter pylori, a bacterium.
B. increased secretion of gastric bicarbonate.
C. pH of the stomach contents continuously greater than 4.
D. increased mucus production by the neck cells.
E. None of these choices is correct.
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Question 5) Duodenal gland secretion prevents
A. digestive enzyme release.
B. release of bile from the liver.
C. irritation of the duodenal mucosa by acidic chyme and digestive enzymes.
D. the release of insulin.
E. peristalsis.
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Question 6) The hepatopancreatic ampulla is formed by the union of the
A. pancreatic duct with the lacteals.
B. greater duodenal papilla with the lesser duodenal papilla.
C. common bile duct and pancreatic duct.
D. cystic duct and interlobular duct.
E. hepatic ducts and cystic ducts.
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Question 7) Enzymes secreted by the small intestine include
A. disaccharidases.
B. secretin.
C. cholecystokinin.
D. bile.
E. histamine.
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Question 8) Which of the following would stimulate gastric secretion?
A. acidic chyme in duodenum
B. secretin
C. gastrin
D. cholecystokinin
E. pepsin
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Question 9) Fatty acids and certain lipids in the duodenum initiate the release of
A. secretin and gastrin.
B. cholecystokinin (CCK).
C. gastrin and histamine.
D. somatostatin and CCK.
E. insulin and glucagon.
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Question 10) The enterogastric reflex can be triggered by
A. distention of the duodenal wall.
B. the presence of food in the stomach.
C. increased pH in the duodenum.
D. the cerebral cortex.
E. the hormone secretin.
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