MSF Exam Practice Exam Questions And
Answers Verified 100% Correct
1. Which of the following carbohydrate molecules is a disaccharide?
a) glucose
b) fructose
c) maltose
d) galactose - ANSWER c
2. The type of chemical reaction involved in the digestion of protein involves...
a) adding a molecule of water in order to break a C-C bond.
b) adding a molecule of water in order to break a C-N bond.
c) removing a molecule of water in order to break a C-C bond.
d) removing a molecule of water in order to break a C-N bond. - ANSWER b
3. Only simple amino acids can be absorbed by intestinal enterocytes, but they can be
reassembled into dipeptides and tripeptides before being exported to the blood.
a) True
b) False - ANSWER b
4. Which of the following locations manufactures an enzyme or enzymes that can
participate in digestion of protein?
a) Pancreas
b) Endothelium of the small intestine
c) Stomach chief cells
d) All of the former are correct.
e) Only A and C are correct. - ANSWER d
5. Which major electrolyte is actively absorbed by enterocytes in the jejunum, ileum
and colon? a) Cl-
b) HCO3-
c) K+
d) Na+ - ANSWER d
6. A reason that Vitamin D is needed for proper Ca++ absorption is that...
a) it opens the calcium channels in the enterocyte membrane.
b) it induces the synthesis of calmodulin.
c) it induces the synthesis of calbindin.
d) All of the former are correct.
e) Only b and c are correct. - ANSWER e
7. GI immune cells tend to produce mediators that
,a) increase intestinal secretion.
b) increase intestinal absorption.
c) decrease intestinal secretion.
d) decrease intestinal absorption. - ANSWER a
8. In a liver acinus, which of the following processes would be most likely to occur in
Zone 3?
a) lipogenesis
b) gluconeogenesis
c) ureagenesis
d) Krebs cycle and electron transport system - ANSWER a
9. Select the correct statement.
a) The liver makes chylomicrons from VLDL.
b) A lipoprotein is a particle or complex, rather than a single molecule.
c) LDL removes cholesterol from peripheral tissues.
d) LDL is the precursor of VLDL. - ANSWER b
10. Select the correct statement.
a) The purpose of the Cori cycle is to reform glutamate after it has been partially
metabolized during anaerobic respiration.
b) Unconjugated bilirubin is more soluble in plasma than conjugated bilirubin.
c) Hepatocytes hydroxylate a Vitamin D precursor.
d) Albumin is a plasma protein that decreases the blood's osmotic pressure. -
ANSWER c
11. Select the correct statement.
a) The hypothalamus itself produces the prostaglandins that reset its center for
temperature regulation.
b) Bacteria and viruses can provoke a fever in a human host, because they secret
the pyrogen interleukin 1.
c) Exogenous pyrogens stimulate phagocytic cells to produce prostaglandins, which
affect the hypothalamus. - ANSWER a
1. Which of the following substances is released from neurons in the GI tract and
produces smooth muscle relaxation?
(A) Secretin
(B) Gastrin
(C) Cholecystokinin (CCK)
(D) Vasoactive intestinal peptide (VIP)
(E) Gastric inhibitory peptide (GIP) - ANSWER d
2. Which of the following is the site of secretion of intrinsic factor?
, (A) Gastric antrum
(B) Gastric fundus
(C) Duodenum
(D) Ileum
(E) Colon - ANSWER b
3. Vibrio cholerae causes diarrhea because it
(A) increases HCO3- secretory channels in intestinal epithelial cells
(B) increases Cl- secretory channels in crypt cells
(C) prevents the absorption of glucose and causes water to be retained in the intestinal
lumen isosmotically
(D) inhibits cyclic adenosine monophos- phate (cAMP) production in intestinal epithelial
cells
(E) inhibits inositol 1,4,5-triphosphate (IP3) production in intestinal epithelial cells -
ANSWER b
4. Cholecystokinin (CCK) has some gastrin-like properties because both CCK and
gastrin
(A) are released from G cells in the stomach
(B) are released from I cells in the duodenum
(C) are members of the secretin-homologous family
(D) have five identical C-terminal amino acids
(E) have 90% homology of their amino acids - ANSWER d
5. Which of the following is transported in intestinal epithelial cells by a Na+-dependent
cotransport process?
(A) Fatty acids
(B) Triglycerides
(C) Fructose
(D) Alanine
(E) Oligopeptides - ANSWER d
6. A 49-year-old male patient with severe Crohn's disease has been unresponsive to
drug therapy and undergoes ileal resection. After the surgery, he will have steatorrhea
because
(A) the liver bile acid pool increases
(B) chylomicrons do not form in the intestinal lumen
(C) micelles do not form in the intestinal lumen
(D) dietary triglycerides cannot be digested
(E) the pancreas does not secrete lipase - ANSWER c
7. Cholecystokinin (CCK) inhibits
(A) gastric emptying
Answers Verified 100% Correct
1. Which of the following carbohydrate molecules is a disaccharide?
a) glucose
b) fructose
c) maltose
d) galactose - ANSWER c
2. The type of chemical reaction involved in the digestion of protein involves...
a) adding a molecule of water in order to break a C-C bond.
b) adding a molecule of water in order to break a C-N bond.
c) removing a molecule of water in order to break a C-C bond.
d) removing a molecule of water in order to break a C-N bond. - ANSWER b
3. Only simple amino acids can be absorbed by intestinal enterocytes, but they can be
reassembled into dipeptides and tripeptides before being exported to the blood.
a) True
b) False - ANSWER b
4. Which of the following locations manufactures an enzyme or enzymes that can
participate in digestion of protein?
a) Pancreas
b) Endothelium of the small intestine
c) Stomach chief cells
d) All of the former are correct.
e) Only A and C are correct. - ANSWER d
5. Which major electrolyte is actively absorbed by enterocytes in the jejunum, ileum
and colon? a) Cl-
b) HCO3-
c) K+
d) Na+ - ANSWER d
6. A reason that Vitamin D is needed for proper Ca++ absorption is that...
a) it opens the calcium channels in the enterocyte membrane.
b) it induces the synthesis of calmodulin.
c) it induces the synthesis of calbindin.
d) All of the former are correct.
e) Only b and c are correct. - ANSWER e
7. GI immune cells tend to produce mediators that
,a) increase intestinal secretion.
b) increase intestinal absorption.
c) decrease intestinal secretion.
d) decrease intestinal absorption. - ANSWER a
8. In a liver acinus, which of the following processes would be most likely to occur in
Zone 3?
a) lipogenesis
b) gluconeogenesis
c) ureagenesis
d) Krebs cycle and electron transport system - ANSWER a
9. Select the correct statement.
a) The liver makes chylomicrons from VLDL.
b) A lipoprotein is a particle or complex, rather than a single molecule.
c) LDL removes cholesterol from peripheral tissues.
d) LDL is the precursor of VLDL. - ANSWER b
10. Select the correct statement.
a) The purpose of the Cori cycle is to reform glutamate after it has been partially
metabolized during anaerobic respiration.
b) Unconjugated bilirubin is more soluble in plasma than conjugated bilirubin.
c) Hepatocytes hydroxylate a Vitamin D precursor.
d) Albumin is a plasma protein that decreases the blood's osmotic pressure. -
ANSWER c
11. Select the correct statement.
a) The hypothalamus itself produces the prostaglandins that reset its center for
temperature regulation.
b) Bacteria and viruses can provoke a fever in a human host, because they secret
the pyrogen interleukin 1.
c) Exogenous pyrogens stimulate phagocytic cells to produce prostaglandins, which
affect the hypothalamus. - ANSWER a
1. Which of the following substances is released from neurons in the GI tract and
produces smooth muscle relaxation?
(A) Secretin
(B) Gastrin
(C) Cholecystokinin (CCK)
(D) Vasoactive intestinal peptide (VIP)
(E) Gastric inhibitory peptide (GIP) - ANSWER d
2. Which of the following is the site of secretion of intrinsic factor?
, (A) Gastric antrum
(B) Gastric fundus
(C) Duodenum
(D) Ileum
(E) Colon - ANSWER b
3. Vibrio cholerae causes diarrhea because it
(A) increases HCO3- secretory channels in intestinal epithelial cells
(B) increases Cl- secretory channels in crypt cells
(C) prevents the absorption of glucose and causes water to be retained in the intestinal
lumen isosmotically
(D) inhibits cyclic adenosine monophos- phate (cAMP) production in intestinal epithelial
cells
(E) inhibits inositol 1,4,5-triphosphate (IP3) production in intestinal epithelial cells -
ANSWER b
4. Cholecystokinin (CCK) has some gastrin-like properties because both CCK and
gastrin
(A) are released from G cells in the stomach
(B) are released from I cells in the duodenum
(C) are members of the secretin-homologous family
(D) have five identical C-terminal amino acids
(E) have 90% homology of their amino acids - ANSWER d
5. Which of the following is transported in intestinal epithelial cells by a Na+-dependent
cotransport process?
(A) Fatty acids
(B) Triglycerides
(C) Fructose
(D) Alanine
(E) Oligopeptides - ANSWER d
6. A 49-year-old male patient with severe Crohn's disease has been unresponsive to
drug therapy and undergoes ileal resection. After the surgery, he will have steatorrhea
because
(A) the liver bile acid pool increases
(B) chylomicrons do not form in the intestinal lumen
(C) micelles do not form in the intestinal lumen
(D) dietary triglycerides cannot be digested
(E) the pancreas does not secrete lipase - ANSWER c
7. Cholecystokinin (CCK) inhibits
(A) gastric emptying
