Intrinsic factor
A. increases gastric motility.
B. causes the release of stomach acid.
C. facilitates the absorption of vitamin B12.
D. protects the stomach lining from the effects of stomach acid.
E. stimulates the synthesis of DNA.
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Question 2) Why doesn't the stomach digest itself?
A. The stomach wall lacks proteins so enzymes won't attack it.
B. The digestive enzymes in the stomach aren't efficient enough.
C. The stomach lining is too tough to be digested.
D. The stomach wall is protected by large amounts of mucus.
E. The stomach is protected by HCl.
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Question 3) Reflux of gastric contents into the esophagus occurs because of
A. relaxation of the cardiac sphincter.
B. contraction of the pyloric sphincter.
C. spasms of the submucosal layer of the stomach wall.
D. increased hydrochloric acid production by the parietal cells.
E. increased amounts of mucous produced by the stomach.
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Question 4) Inability of the pyloric sphincter to open would prevent
A. food from entering the stomach.
B. stomach acid from being released.
C. digestive enzymes from being released.
D. food from entering the small intestine.
E. the making of chyme.
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Question 5) Which of the following are secreted by the stomach?
A. amylase and lipase
B. pepsinogen and intrinsic factor
C. bile and lipase
D. trypsin and amylase
E. bicarbonate and secretin
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Question 6) Which of the following represents a mismatch in stomach wall structure?
A. muscularis - two layers; both circular
B. rugae - folds of mucosa and submucosa
C. mucosa - gastric glands
D. gastric pits - open onto surface of stomach mucosa
E. lining - simple columnar epithelium
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Question 7) Which of the following cell types of the stomach is correctly matched with its function?
A. mucous cells - produce intrinsic factor
B. parietal cells - produce hydrochloric acid
C. chief cells - produce mucus
D. endocrine cells - produce enzymes
E. chief cells - produce hormones
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Question 8) Which of the following regions of the stomach is correctly matched with its description?
A. body - portion closest to the esophagus
B. pylorus - the most inferior portion of the stomach
C. fundus - opening from the stomach into the duodenum
D. cardiac region - the largest portion of the stomach
E. pyloric opening - opening from the esophagus
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Question 9) Inflammation of the stomach mucosa in the area superior to the pyloric sphincter is most appropriately referred to as
A. esophagitis.
B. a duodenal ulcer.
C. a hiatal hernia.
D. gastric ulcer.
E. indigestion.
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Question 10) What moves the bolus during the esophageal phase of deglutition?
A. pharyngeal constriction
B. peristalsis
C. the tongue
D. segmentation
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