Question 1

Which of the following is not a trigger for mass movements of the colon?

Accepted Answer

A)   The gastrocolic reflex
B)   The duodenocolic reflex
C)   Chyme filling the duodenum
D)   Chyme filling the stomach
E)   The colorectal reflex

Question 2

Infants have __________ deciduous teeth,whereas adults have __________ permanent teeth.

Accepted Answer

A)   20;32
B)   16;20
C)   28;20
D)   32;20
E)   32;32

Question 3

Which of the following is not a process carried out by bacterial flora?

Accepted Answer

A)   Digestion of most of the proteins we get in the diet
B)   Synthesis of vitamin K
C)   Production of some of the gases found in flatus
D)   Digestion of cellulose
E)   Formation of part of the feces

Question 4

Which of the following has an abundance of lymphoid tissue in the mucosa and submucosa?

Accepted Answer

A)   small intestine
B)   large intestine
C)   stomach
D)   esophagus
E)   mouth

Question 5

Which of the following nutrients must be digested in order to be absorbed?

Accepted Answer

A)   Water
B)   Vitamins
C)   Proteins
D)   Minerals
E)   Cholesterol

Question 6

Defecation is controlled by a __________.

Accepted Answer

A)   myenteric reflex only
B)   spinal reflex only
C)   myenteric reflex and a spinal reflex

Question 7

Several digestive enzymes are secreted as zymogens because __________.

Accepted Answer

A)   it saves one step in their synthesis
B)   gastric cells do not have the necessary enzymes for their synthesis
C)   they start digesting intracellular proteins of the gastric cells more quickly
D)   they act only in the stomach lumen and do not digest intracellular proteins
E)   they can start digesting dietary proteins more quickly

Question 8

Hydrochloric acid (HCl) is secreted by __________ cells.

Accepted Answer

A)   mucous
B)   regenerative (stem) 
C)   parietal
D)   chief
E)   enteroendocrine

Question 9

Absorption of many nutrients starts in the stomach.

Accepted Answer

A) True 
 B)False

Question 10

The __________ regulates the flow of contents from the stomach to the duodenum.

Accepted Answer

A)   gastric rugae
B)   antrum
C)   pyloric sphincter
D)   fundus
E)   cardial part

Question 11

The three most abundant classes of nutrients are __________.

Accepted Answer

A)   carbohydrates,proteins,and minerals
B)   fats,proteins,and carbohydrates
C)   proteins,nucleic acids,and carbohydrates
D)   triglycerides,starches,and proteins
E)   proteins,fats,and minerals

Question 12

The serous membranes that suspend the stomach and intestines from the abdominal wall are called __________.

Accepted Answer

A)   mesenteries
B)   mucosae
C)   submucosae
D)   muscularis mucosae
E)   muscularis externa

Question 13

Which of the following statements regarding the migrating motor complex is true?

Accepted Answer

A)   It milks the chyme toward the colon.
B)   It allows a bolus to move down the esophagus.
C)   It churns and mixes residue in the descending colon.
D)   It churns and mixes a bolus with gastric juices.
E)   It propels pancreatic juice down the pancreatic duct.

Question 14

All chemical digestion is essentially just hydrolysis reactions.

Accepted Answer

A) True 
 B)False

Question 15

__________ is a hormone,whereas __________ is an enzyme.

Accepted Answer

A)   Enteropeptidase;pepsin
B)   Gastrin;secretin
C)   Gastrin;cholecystokinin (CCK) 
D)   Gastric lipase;histamine
E)   Secretin;pepsin

Question 16

Both chemical and mechanical digestion start in the mouth and continue in the stomach.

Accepted Answer

A) True 
 B)False

Question 17

The stomach contains enteric pacemaker cells responsible for its regular churning motion and thus mechanical digestion.

Accepted Answer

A) True 
 B)False

Question 18

Lipids are transported to the surface of the intestinal absorptive cells by __________,and are then processed into __________.

Accepted Answer

A)   fat droplets;micelles
B)   fat droplets;chylomicrons
C)   micelles;fat droplets
D)   micelles;chylomicrons

Question 19

The enteric nervous system regulates much of the digestive activity,but its action depends on the central nervous system.

Accepted Answer

A) True 
 B)False

Question 20

The liver is the body's largest gland.

Accepted Answer

A) True 
 B)False

Exam 25: The Digestive System

The stomach contains enteric pacemaker cells responsible for its regular churning motion and thus mechanical digestion.

Correct AnswerverifiedShow Answer

All chemical digestion is essentially just hydrolysis reactions.

Correct AnswerverifiedShow Answer

The serous membranes that suspend the stomach and intestines from the abdominal wall are called __________.

Correct AnswerverifiedShow Answer

Which of the following nutrients must be digested in order to be absorbed?

Correct AnswerverifiedShow Answer

The three most abundant classes of nutrients are __________.

Correct AnswerverifiedShow Answer

Infants have __________ deciduous teeth,whereas adults have __________ permanent teeth.

Correct AnswerverifiedShow Answer

Several digestive enzymes are secreted as zymogens because __________.

Correct AnswerverifiedShow Answer

Absorption of many nutrients starts in the stomach.

Correct AnswerverifiedShow Answer

The enteric nervous system regulates much of the digestive activity,but its action depends on the central nervous system.

Correct AnswerverifiedShow Answer

Which of the following statements regarding the migrating motor complex is true?

Correct AnswerverifiedShow Answer

Which of the following is not a process carried out by bacterial flora?

Correct AnswerverifiedShow Answer

Defecation is controlled by a __________.

Correct AnswerverifiedShow Answer

The liver is the body's largest gland.

Correct AnswerverifiedShow Answer

Hydrochloric acid (HCl) is secreted by __________ cells.

Correct AnswerverifiedShow Answer

The __________ regulates the flow of contents from the stomach to the duodenum.

Correct AnswerverifiedShow Answer

Which of the following is not a trigger for mass movements of the colon?

Correct AnswerverifiedShow Answer

Both chemical and mechanical digestion start in the mouth and continue in the stomach.

Correct AnswerverifiedShow Answer

__________ is a hormone,whereas __________ is an enzyme.

Correct AnswerverifiedShow Answer

Lipids are transported to the surface of the intestinal absorptive cells by __________,and are then processed into __________.

Correct AnswerverifiedShow Answer

Which of the following has an abundance of lymphoid tissue in the mucosa and submucosa?

Correct AnswerverifiedShow Answer

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Infants have deciduous teeth,whereas adults have permanent teeth.

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is a hormone,whereas is an enzyme.

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Lipids are transported to the surface of the intestinal absorptive cells by ,and are then processed into .

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