Question 1

What disease is caused by the absence of enteric neurons in the distal large intestine?

Accepted Answer

A)   Hirschprung disease
B)   multiple endocrine neoplasia type 2
C)   spastic colon
D)   gastroenteritisE) A) and D)
F) B) and C)

Question 2

Where does the majority of nutrient absorption occur?

Accepted Answer

A)   the stomach and duodenum
B)   the duodenum and ileum
C)   the jejunum and duodenum
D)   the ileum and jejunumE) None of the above
F) All of the above

Question 3

Which of the following is true?

Accepted Answer

A)   Peptidases are made in the large intestine.
B)   Intestinal epithelial cells absorb more dipeptides and tripeptides than single amino acids.
C)   The hepatic artery transports amino acids from the small intestine to the liver.
D)   Amino acids leave intestinal epithelial cells and enter the lacteals.
E)   Protein digestion starts in the duodenum.F) A) and C)
G) None of the above

Question 4

If the thoracic duct were tied off, which of the following classes of nutrients would not enter the circulatory system at their normal rate?

Accepted Answer

A)   amino acids
B)   glucose
C)   lipids
D)   disaccharides
E)   monosaccharidesF) C) and D)
G) A) and E)

Question 5

Use the key to choose the best answer.
-(1)  number of villi in small intestine;
(2)  number of villi in large intestine

Accepted Answer

A)  Choose this if the first item is greater than the second item.
B)  Choose this if the first item is less than the second item.
C)  Choose this if the first item is equal or nearly equal to the second item.D) A) and B)
E) All of the above

Question 6

The defecation reflex

Accepted Answer

A)   is stimulated by distention of the rectum.
B)   inhibits further peristalsis in the rectum and lower colon.
C)   constricts the internal anal sphincter.
D)   lasts several hours.
E)   None of these choices is correct.F) C) and D)
G) None of the above

Question 7

The hepatic sinusoids

Accepted Answer

A)   transport bile.
B)   have phagocytic cells in their lining.
C)   are part of the portal triad.
D)   connect to the gallbladder.
E)   do not have a function.F) A) and B)
G) B) and E)

Question 8

The _____________ phase of gastric regulation is initiated when acidic chyme enters the duodenum and simulates the secretion of hormones and local reflexes that inhibit gastric activity.

Accepted Answer

A)   gastrointestinal
B)   cephalic
C)   laryngo-pharyngeal
D)   voluntaryE) None of the above
F) A) and B)

Question 9

Which of the following occurs in the large intestine?

Accepted Answer

A)   chemical digestion
B)   mass movements
C)   mastication
D)   mixing waves
E)   neutralizationF) A) and C)
G) D) and E)

Question 10

Blockage of the ileocecal valve would prevent

Accepted Answer

A)   pancreatic juice from entering the duodenum.
B)   bile from entering the duodenum.
C)   lymph from entering the jejunum.
D)   chyme from entering the ileum.
E)   chyme from entering the large intestine.F) A) and D)
G) C) and D)

Question 11

Match the enzyme with the products of its digestive activity.
-salivary amylase

Accepted Answer

A)  glucose and galactose
B)  amino acids
C)  fatty acids and glycerol
D)  maltose and isomaltose
E)  polysaccharides and disaccharidesF) A) and B)
G) B) and C)

Question 12

Match the enzyme or hormone with the organ that produces it.
-lactase

Accepted Answer

A)  salivary glands
B)  stomach
C)  liver
D)  small intestine
E)  pancreasF) A) and B)
G) All of the above

Question 13

The enteric plexus

Accepted Answer

A)   is found in the mucosa.
B)   consists of the myenteric plexus and the celiac plexus.
C)   contains sympathetic neurons and fibers.
D)   controls movement and secretion of the digestive tract.
E)   is a valve in the GI tract.F) A) and B)
G) A) and C)

Question 14

Which of the following structures has both endocrine and exocrine tissue?

Accepted Answer

A)   colon
B)   liver
C)   pancreas
D)   gallbladder
E)   spleenF) A) and B)
G) D) and E)

Question 15

Match the process or term with the best description.
-bolus

Accepted Answer

A)  swallowing
B)  chewing
C)  ball of food
D)  semifluid material
E)  phagocytosisF) A) and B)
G) A) and E)

Question 16

Enterokinase

Accepted Answer

A)   is a hormone.
B)   triggers the release of bile from the gallbladder.
C)   activates trypsinogen.
D)   increases duodenal motility.
E)   digests proteins.F) A) and B)
G) A) and E)

Question 17

How are ions such as sodium, potassium, calcium, magnesium, and phosphate transported from the intestinal lumen?

Accepted Answer

A)   passive transport
B)   osmosis
C)   diffusion
D)   active transportE) B) and D)
F) None of the above

Question 18

Match the enzyme or hormone with the organ that produces it.
-trypsin

Accepted Answer

A)  salivary glands
B)  stomach
C)  liver
D)  small intestine
E)  pancreasF) A) and B)
G) A) and C)

Question 19

Which of the following is NOT a necessary function of the tongue?

Accepted Answer

A)   swallowing
B)   chewing
C)   taste
D)   speechE) A) and C)
F) B) and C)

Question 20

Arrange the following events in the correct order: (1)  absorption of lipids
(2)  emulsification
(3)  micelle formation
(4)  digestion of lipids

Accepted Answer

A)   1, 2, 3, 4
B)   3, 4, 2, 1
C)   4, 1, 2, 3
D)   2, 4, 1, 3
E)   2, 4, 3, 1F) B) and C)
G) B) and E)

Exam 24: Digestive System

Where does the majority of nutrient absorption occur?

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Which of the following structures has both endocrine and exocrine tissue?

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The hepatic sinusoids

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Use the key to choose the best answer. -(1) number of villi in small intestine; (2) number of villi in large intestine

Correct AnswerverifiedShow Answer

Match the enzyme with the products of its digestive activity. -salivary amylase

Correct AnswerverifiedShow Answer

The _____________ phase of gastric regulation is initiated when acidic chyme enters the duodenum and simulates the secretion of hormones and local reflexes that inhibit gastric activity.

Correct AnswerverifiedShow Answer

Match the enzyme or hormone with the organ that produces it. -trypsin

Correct AnswerverifiedShow Answer

Match the enzyme or hormone with the organ that produces it. -lactase

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Enterokinase

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The enteric plexus

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The defecation reflex

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Arrange the following events in the correct order: (1) absorption of lipids (2) emulsification (3) micelle formation (4) digestion of lipids

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Blockage of the ileocecal valve would prevent

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Which of the following occurs in the large intestine?

Correct AnswerverifiedShow Answer

What disease is caused by the absence of enteric neurons in the distal large intestine?

Correct AnswerverifiedShow Answer

If the thoracic duct were tied off, which of the following classes of nutrients would not enter the circulatory system at their normal rate?

Correct AnswerverifiedShow Answer

Which of the following is true?

Correct AnswerverifiedShow Answer

How are ions such as sodium, potassium, calcium, magnesium, and phosphate transported from the intestinal lumen?

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Match the process or term with the best description. -bolus

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Which of the following is NOT a necessary function of the tongue?

Correct AnswerverifiedShow Answer

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