Which of these are secretions of the parietal cells of the gastric mucosa?
A. HCl and pepsinogen
B. pepsinogen and intrinsic factor
C. gastrin and intrinsic factor
D. HCl and gastrin
E. HCl and intrinsic factor
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Question 2) Which combination of substances would cause the greatest stimulation of gastric HCl secretion when applied to parietal cells?
A. somatostatin, gastrin, and histamine
B. acetylcholine, histamine, and somatostatin
C. somatostatin and acetylcholine
D. gastrin, histamine, and acetylcholine
E. histamine and gastrin
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Question 3) Which of the following is secreted by the chief cells of the gastric mucosa?
A. pepsinogen
B. HCl
C. intrinsic factor
D. gastrin
E. pepsin
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Question 4) Which of the following pathways is activated during the cephalic phase of gastrointestinal control?
A. sympathetic nerves to enteric nervous system
B. secretion of cholecystokinin
C. secretion of secretin
D. parasympathetic nerves to enteric nervous system
E. short reflexes between the small intestine and stomach
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Question 5) During the cephalic phase of gastric stimulation, which of the following does NOT occur?
A. Seeing, smelling, and/or tasting food reflexly increase(s) gastric acid secretion.
B. Parasympathetic stimulation of secretory cells in the gastric mucosa occurs.
C. Gastrin is secreted into the gastric lumen.
D. HCl is secreted into the gastric lumen.
E. Pepsinogen is secreted into the gastric lumen.
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Question 6) The type of smooth muscle contraction occurring in the esophagus during swallowing is called:
A. peristalsis.
B. mass movement.
C. segmentation.
D. distension.
E. eccentric.
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Question 7) Which of the following is NOT a part of the swallowing reflex?
A. Respiration is inhibited.
B. The glottis closes.
C. The upper esophageal sphincter relaxes.
D. The lower esophageal sphincter relaxes.
E. The pyloric sphincter relaxes.
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Question 8) Which of the following statements regarding lipid digestion and absorption is TRUE?
A. The presence of fatty acids in the duodenum stimulates the secretion of CCK, which in turn stimulates secretion of pancreatic enzymes.
B. The presence of fatty acids in the duodenum stimulates the secretion of secretin, which in turn stimulates contraction of the gallbladder.
C. The presence of fatty acids in the duodenum stimulates the secretion of gastrin, which in turn stimulates bile synthesis in the gallbladder.
D. The presence of fatty acids in the duodenum stimulates emptying of the stomach.
E. The presence of fatty acids in the stomach stimulates the secretion of secretin, which inhibits motility of the large intestine.
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Question 9) Which of the following statements concerning secretin is correct?
A. The most potent stimulus for secretin secretion is the presence of fat in the duodenum.
B. Secretin is the most potent stimulus for pancreatic digestive enzyme secretion.
C. Secretin is the most potent stimulus for pancreatic HCO3- secretion.
D. Secretin stimulates secretion by the parietal and chief cells.
E. Secretin stimulates gastrin secretion by parietal cells.
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Question 10) Which is caused by increased levels of the hormone cholecystokinin?
A. contraction of the sphincter of Oddi
B. inhibition of pancreatic enzyme secretion
C. contraction of the gallbladder
D. secretion of HCO3- from the pancreatic duct cells
E. secretion of gastric H+
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