Question 1

Both parasympathetic and sympathetic stimulation increase salivary secretion, contrary to the usual antagonistic activity of these two components of the autonomic nervous system.

Accepted Answer

A) True 
 B)False

Question 2

Sodium can be absorbed both actively and passively.

Accepted Answer

A) True 
 B)False

Question 3

Indicate the site, labelled a. through e., at which digestion of each of the three main categories of foodstuffs commences and is completed. (Options may be used more than once or not at all.) 
-carbohydrate digestion is completed

Accepted Answer

A)  mouth
B)  stomach
C)  small intestine lumen
D)  intracellularly in the small intestine brush border
E)  colonF) A) and D)
G) A) and C)

Question 4

Why is the intestinal hormone secretin released by endocrine cells in the duodenal mucosa

Accepted Answer

A)  in response to distention of the stomach
B)  in response to carbohydrate in the duodenum
C)  in response to acid in the duodenum
D)  in response to gastrin secreted by the pyloric gland area of the stomachE) None of the above
F) A) and B)

Question 5

What does the pyloric gland area of the stomach antrum secrete

Accepted Answer

A)  histamine
B)  gastrin
C)  intrinsic factor
D)  somatostatinE) A) and C)
F) B) and D)

Question 6

CCK causes relaxation of the sphincter of Oddi.

Accepted Answer

A) True 
 B)False

Question 7

Which of the following is NOT a component of saliva

Accepted Answer

A)  amylase
B)  mucus
C)  pepsin
D)  lysozymeE) B) and D)
F) B) and C)

Question 8

The enterogastric reflex and enterogastrones inhibit gastric motility but stimulate gastric secretion.

Accepted Answer

A) True 
 B)False

Question 9

Which of these statements does NOT apply to the digestion of polysaccharides

Accepted Answer

A)  It is accomplished using enzymes.
B)  It utilizes hydrolysis.
C)  It utilizes dehydration synthesis.
D)  It adds water at the bond site.E) B) and C)
F) A) and B)

Question 10

The rate of gastric emptying is influenced by factors both in the stomach and in the duodenum.

Accepted Answer

A) True 
 B)False

Question 11

HCl activates pepsinogen.

Accepted Answer

A) True 
 B)False

Question 12

Which of these factors is the most potent stimulus for inhibition of gastric motility

Accepted Answer

A)  fat in the duodenum
B)  acid in the duodenum
C)  acid in the stomach
D)  distention of the stomachE) None of the above
F) A) and C)

Question 13

Pepsin formation in the stomach is autocatalytic.

Accepted Answer

A) True 
 B)False

Question 14

What does pepsinogen do after it has been activated

Accepted Answer

A)  It autocatalytically activates more pepsinogen.
B)  It activates the pancreatic proteolytic enzymes in the duodenal lumen after gastric emptying has occurred.
C)  It inhibits the pyloric gland area in a negative-feedback fashion.
D)  It inhibits the secretion of HCl.E) None of the above
F) A) and B)

Question 15

Which of these activities occurs during the cephalic phase of gastric digestion

Accepted Answer

A)  CCK is secreted by the small intestine.
B)  Chemoreceptors detect fatty acids in the duodenum.
C)  Stretch receptors detect distension of the stomach.
D)  Sight, smell, thought, or taste of food triggers parasympathetic impulses.E) None of the above
F) All of the above

Question 16

The contents of the digestive tract are technically outside the body.

Accepted Answer

A) True 
 B)False

Question 17

Match the gastric cell types, labelled a. through d., with the correct characteristics. (Options may be used more than once or not at all.) 
-secrete intrinsic factor

Accepted Answer

A)  chief cells
B)  parietal cells
C)  mucous cells
D)  G cells of PGAE) A) and B)
F) None of the above

Question 18

Match the digestive secretions, labelled a. through e., to the descriptions. (Options may be used more than once or not at all.) 
-exerts detergent action

Accepted Answer

A)  bile salts
B)  pepsin(ogen) 
C)  amylase
D)  lipase
E)  trypsin(ogen) F) A) and B)
G) A) and C)

Question 19

Describe the defecation reflex.

Accepted Answer

The answer of Describe the defecation reflex....

Question 20

Chyme is produced in the stomach.

Accepted Answer

A) True 
 B)False

Exam 15: The Digestive System

The rate of gastric emptying is influenced by factors both in the stomach and in the duodenum.

Correct AnswerverifiedShow Answer

Match the gastric cell types, labelled a. through d., with the correct characteristics. (Options may be used more than once or not at all.) -secrete intrinsic factor

Correct AnswerverifiedShow Answer

What does the pyloric gland area of the stomach antrum secrete

Correct AnswerverifiedShow Answer

Chyme is produced in the stomach.

Correct AnswerverifiedShow Answer

The contents of the digestive tract are technically outside the body.

Correct AnswerverifiedShow Answer

Match the digestive secretions, labelled a. through e., to the descriptions. (Options may be used more than once or not at all.) -exerts detergent action

Correct AnswerverifiedShow Answer

The enterogastric reflex and enterogastrones inhibit gastric motility but stimulate gastric secretion.

Correct AnswerverifiedShow Answer

Describe the defecation reflex.

Correct AnswerverifiedShow Answer

Which of the following is NOT a component of saliva

Correct AnswerverifiedShow Answer

Sodium can be absorbed both actively and passively.

Correct AnswerverifiedShow Answer

HCl activates pepsinogen.

Correct AnswerverifiedShow Answer

Pepsin formation in the stomach is autocatalytic.

Correct AnswerverifiedShow Answer

Which of these factors is the most potent stimulus for inhibition of gastric motility

Correct AnswerverifiedShow Answer

Which of these statements does NOT apply to the digestion of polysaccharides

Correct AnswerverifiedShow Answer

Why is the intestinal hormone secretin released by endocrine cells in the duodenal mucosa

Correct AnswerverifiedShow Answer

CCK causes relaxation of the sphincter of Oddi.

Correct AnswerverifiedShow Answer

Indicate the site, labelled a. through e., at which digestion of each of the three main categories of foodstuffs commences and is completed. (Options may be used more than once or not at all.) -carbohydrate digestion is completed

Correct AnswerverifiedShow Answer

Both parasympathetic and sympathetic stimulation increase salivary secretion, contrary to the usual antagonistic activity of these two components of the autonomic nervous system.

Correct AnswerverifiedShow Answer

Which of these activities occurs during the cephalic phase of gastric digestion

Correct AnswerverifiedShow Answer

What does pepsinogen do after it has been activated

Correct AnswerverifiedShow Answer

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