Food in the stomach is squeezed and mixed with gastric juices, forming a semiliquid called
A. bolusin.
B. chyme.
C. bile.
D. phlegm.
E. feces.
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Question 2) Anticipation of eating food causes an increase in secretion of gastric juice. This phase of gastric secretion is called the _____ phase.
A. cephalic
B. gastric
C. intestinal
D. pancreatic
E. conscious
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Question 3) Which of the following would inhibit both gastric secretion and gastric motility?
A. vagal stimulation
B. chewing and swallowing food
C. cholecystokinin (CCK)
D. gastrin
E. large amounts of fiber in the diet
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Question 4) The gastric phase of gastric secretion
A. decreases the release of gastrin in the stomach.
B. is triggered by taste, sight, thought, or smell of food.
C. is mediated by impulses on sympathetic nerves.
D. leads to the greatest volume of gastric secretion.
E. leads to the least volume of gastric secretion.
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Question 5) The distention of the stomach by food is the primary stimulus to begin the
A. cephalic phase of gastric secretion.
B. gastric phase of gastric secretion.
C. intestinal phase of gastric secretion.
D. cystic phase of gastric secretion.
E. hepatic phase of gastric secretion.
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Question 6) The intestinal phase of gastric secretion
A. is controlled by the entrance of acidic chyme into the duodenum.
B. leads to increased gastric secretion if duodenal pH falls below 2.
C. only stimulates gastric secretion.
D. will decrease gastric secretion when gastrin is released by the duodenum.
E. is controlled by the entrance of alkaline material into the small intestines.
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Question 7) Pepsinogen
A. is secreted by parietal cells.
B. is activated by salivary amylase in swallowed food.
C. is packaged in zymogen granules.
D. operates optimally at a pH of 5 or more.
E. helps to form peptide bonds.
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Question 8) Which of the following events occurs because of the low pH of the stomach?
A. activation of salivary amylase
B. enhanced carbohydrate digestion
C. proper environment for functioning of pepsin
D. protein synthesis
E. lipid digestion
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Question 9) The formation of HCl in the stomach involves the
A. active transport of hydrogen ions from parietal cells into the lumen of the stomach.
B. exchange of sodium ions for hydrogen ions in the transport process.
C. active transport of chloride ions from parietal cells into the lumen of the stomach.
D. exchange of sodium and bicarbonate ions.
E. the combination of carbon dioxide and water.
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Question 10) Assume we could alter the conditions in the duodenum. If we inserted a large volume of highly acidic chyme which contained a large amount of fat, which of the following responses are consistent with that?
(1) decreased gastric acid secretion
(2) increased bile production
(3) increased pancreatic bicarbonate production and pancreatic enzyme secretion
(4) increased secretin and cholecystokinin
A. 1, 2, 3, 4
B. 1, 2, 3
C. 2, 3, 4
D. 1, 3, 4
E. 1, 2, 4
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