Question 1

Short chains of amino acids and some intact proteins are absorbed from the small intestine.

Accepted Answer

A) True 
 B)False

Question 2

In general,sympathetic stimulation increases gastric secretion and motility,while parasympathetic stimulation decreases these two processes.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following statements concerning secretin is correct?

Accepted Answer

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.F) C) and D)
G) All of the above

Question 4

Any agent that interferes with water absorption or that causes water secretion into the gastrointestinal tract can cause diarrhea.

Accepted Answer

A) True 
 B)False

Question 5

Glucose absorption across the luminal membrane of intestinal epithelial cells occurs by secondary active transport.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following statements regarding neural regulation of gastrointestinal function is TRUE?

Accepted Answer

A)  Networks of neurons in the wall of the GI tract innervate the wall's smooth muscle.
B)  Smooth muscle of the GI tract is innervated by both sympathetic and autonomic motor nerves.
C)  If the autonomic nerves to the GI tract were cut,digestion and absorption of food could no longer take place.
D)  The nerve plexus of the GI tract exists in a single layer,just outside of the serosa.
E)  There are no afferent neuronal pathways from the GI tract to the central nervous system.F) A) and D)
G) A) and E)

Question 7

Polysaccharides must be broken down to disaccharides in order to be absorbed.

Accepted Answer

A) True 
 B)False

Question 8

Iron is stored in the body mainly as a protein-iron storage complex called:

Accepted Answer

A)  glycogen.
B)  hemochromatosis.
C)  ferris wheel.
D)  transferrin.
E)  ferritin.F) C) and D)
G) B) and C)

Question 9

Which of these is a secretion of the endocrine portion of the pancreas?

Accepted Answer

A)  trypsinogen
B)  enterokinase
C)  amylase
D)  bicarbonate
E)  insulinF) None of the above
G) B) and E)

Question 10

"Heartburn" following a large meal is usually due to pressure of the stomach against the heart.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following is NOT a part of the swallowing reflex?

Accepted Answer

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.F) A) and D)
G) None of the above

Question 12

Food mixed with digestive juices in the stomach is called chyme.

Accepted Answer

A) True 
 B)False

Question 13

Which of the following would be most likely to cause metabolic acidosis?

Accepted Answer

A)  severe vomiting
B)  severe diarrhea
C)  hyperventilation
D)  hypoventilation
E)  traveling to high altitudeF) A) and C)
G) A) and D)

Question 14

Voluntary control of defecation requires learning to keep the external anal sphincter smooth muscle contracted.

Accepted Answer

A) True 
 B)False

Question 15

Which of the following breakfasts would likely remain in the stomach longest?

Accepted Answer

A)  toast,orange juice,and coffee
B)  fried eggs,bacon,and hash browns
C)  a bowl of cereal with skim milk
D)  a boiled egg,toast,and juice
E)   The type of meal has no effect on the rate of gastric emptying.F) A) and E)
G) B) and D)

Question 16

Flatus is primarily a result of air being swallowed with food.

Accepted Answer

A) True 
 B)False

Question 17

Segmentation of the small intestine:

Accepted Answer

A)  occurs only between meals,and functions to stimulate the secretion of gastrin and the resulting mass-movements that empty the large intestine.
B)  occurs at a rate of 3 contractions per minute throughout the small intestine,although the strength of contractions is much greater in the ileum,which has a much thicker layer of smooth muscle in its walls.
C)  functions mainly to prevent any forward movement of chyme,so that all digestion and absorption is complete before undigestible materials move into the jejunum.
D)  are peristaltic movements that sweep undigestible materials out of the small intestine between meals.
E)  mixes chyme with digestive enzymes,brings food molecules near the wall for absorption,and slowly moves small intestine contents toward the cecum.F) C) and E)
G) All of the above

Question 18

Which of the following is the most potent inhibitor (directly or indirectly) of gastric motility and emptying?

Accepted Answer

A)  fat in the duodenum
B)  acid in the stomach
C)  carbohydrate in the stomach
D)  gastrin
E)  distension of the stomachF) A) and C)
G) All of the above

Question 19

The main source of enzymes that cleave disaccharides into monosaccharides is:

Accepted Answer

A)  the pancreas.
B)  the liver.
C)  gastric secretory cells.
D)  the luminal membrane of epithelial cells in the small intestine.
E)  the salivary glands.F) A) and E)
G) B) and E)

Question 20

Which of the following is NOT true about gallstones?

Accepted Answer

A)  They cause lactose intolerance.
B)  They cause pain.
C)  They cause impaired fat digestion.
D)  They cause general nutritional deficiencies.
E)  They cause jaundice.F) B) and E)
G) B) and C)

Exam 15: The Digestion and Absorption of Food

"Heartburn" following a large meal is usually due to pressure of the stomach against the heart.

Correct AnswerverifiedShow Answer

Polysaccharides must be broken down to disaccharides in order to be absorbed.

Correct AnswerverifiedShow Answer

Segmentation of the small intestine:

Correct AnswerverifiedShow Answer

Which of the following statements regarding neural regulation of gastrointestinal function is TRUE?

Correct AnswerverifiedShow Answer

In general,sympathetic stimulation increases gastric secretion and motility,while parasympathetic stimulation decreases these two processes.

Correct AnswerverifiedShow Answer

Voluntary control of defecation requires learning to keep the external anal sphincter smooth muscle contracted.

Correct AnswerverifiedShow Answer

Which of the following would be most likely to cause metabolic acidosis?

Correct AnswerverifiedShow Answer

Food mixed with digestive juices in the stomach is called chyme.

Correct AnswerverifiedShow Answer

Short chains of amino acids and some intact proteins are absorbed from the small intestine.

Correct AnswerverifiedShow Answer

Flatus is primarily a result of air being swallowed with food.

Correct AnswerverifiedShow Answer

Iron is stored in the body mainly as a protein-iron storage complex called:

Correct AnswerverifiedShow Answer

Which of these is a secretion of the endocrine portion of the pancreas?

Correct AnswerverifiedShow Answer

Which of the following is the most potent inhibitor (directly or indirectly) of gastric motility and emptying?

Correct AnswerverifiedShow Answer

Which of the following is NOT a part of the swallowing reflex?

Correct AnswerverifiedShow Answer

Which of the following statements concerning secretin is correct?

Correct AnswerverifiedShow Answer

Which of the following is NOT true about gallstones?

Correct AnswerverifiedShow Answer

Any agent that interferes with water absorption or that causes water secretion into the gastrointestinal tract can cause diarrhea.

Correct AnswerverifiedShow Answer

The main source of enzymes that cleave disaccharides into monosaccharides is:

Correct AnswerverifiedShow Answer

Glucose absorption across the luminal membrane of intestinal epithelial cells occurs by secondary active transport.

Correct AnswerverifiedShow Answer

Which of the following breakfasts would likely remain in the stomach longest?

Correct AnswerverifiedShow Answer

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