One of the major functions of the large intestine is to
A. produce vitamin C.
B. regulate the release of bile.
C. break down hemoglobin to release bilirubin.
D. convert chyme to feces.
E. absorb nutrients.
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Question 2) The mucosa of the colon
A. contains many mucus-secreting goblet cells.
B. exchanges sodium ions for chloride ions.
C. actively secretes sodium and chloride ions.
D. produces enzymes that complete lipid digestion.
E. consists of stratified columnar epithelium.
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Question 3) The major stimulus for the release of cholecystokinin is the presence of ______ in the intestine.
A. bile
B. pancreatic juice
C. fatty acids and other lipids
D. sugars
E. proteins
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Question 4) Gastrocolic reflexes are reflexes that
A. empty the stomach.
B. release gastric secretions into the stomach.
C. cause mass movements of the colon when food is present in the stomach.
D. lead to mass movements of the colon in response to food in the duodenum.
E. stop movement in the colon.
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Question 5) A proteolytic enzyme secreted by the pancreas is
A. ribonuclease.
B. chymotrypsin.
C. amylase.
D. enterogastrone.
E. pancreatic lipase.
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Question 6) Which of the following statements concerning cholecystokinin is correct?
A. Cholecystokinin stimulates relaxation of the gallbladder.
B. Cholecystokinin stimulates secretion of mucus by the gastric glands.
C. Cholecystokinin stimulates the pancreas to release an enzyme-rich solution.
D. Cholecystokinin stimulates the intestine to secrete trypsin.
E. Cholecystokinin stimulates gastric secretions.
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Question 7) Trypsin can activate
A. pepsinogen.
B. chymotrypsinogen.
C. angiotensinogen.
D. endopeptidase.
E. lipase.
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Question 8) Which of the following enzymes is mismatched with its substrate?
A. pepsin - protein
B. amylase - starch
C. trypsin - nucleic acids
D. lipase - fat
E. deoxyribonucleases - DNA
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Question 9) Which of the following enzymes is found in inactive form in pancreatic juice?
A. bile
B. trypsin
C. sucrase
D. pepsin
E. lipase
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Question 10) Enterokinase
A. is a hormone.
B. triggers the release of bile from the gallbladder.
C. activates trypsinogen.
D. increases duodenal motility.
E. digests proteins.
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