Question 1

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 fecesF) All of the above
G) A) and B)

Question 2

Which of the following enzymes functions at the lowest pH?

Accepted Answer

A)  Salivary amylase
B)  Pancreatic amylase
C)  Pepsin
D)  Trypsin
E)  DipeptidaseF) A) and B)
G) All of the above

Question 3

The movement of colonic contents from one puckered section to another is called __________.

Accepted Answer

A)  the gastrocolic reflex
B)  the duodenocolic reflex
C)  mass movement
D)  haustral contraction
E)  defecationF) B) and E)
G) All of the above

Question 4

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 quicklyF) A) and C)
G) C) and D)

Question 5

The physiological process that moves a nutrient from the outside of the body to the inside is called __________.

Accepted Answer

A)  ingestion
B)  compaction
C)  digestion
D)  absorption
E)  secretionF) C) and D)
G) All of the above

Question 6

Which of the following is not a function of gastric hydrochloric acid (HCl) ?

Accepted Answer

A)  Activate pepsinogen to pepsin
B)  Activate lingual lipase
C)  Emulsify lipids
D)  Destroy ingested pathogens
E)  Convert Fe3+ to Fe2+F) A) and B)
G) None of the above

Question 7

Absorption of many nutrients starts in the stomach.

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

Of the following components of bile,only __________ has/have a digestive function.

Accepted Answer

A)  bile salts
B)  bilirubin
C)  cholesterol
D)  phospholipids
E)  neutral fatsF) A) and E)
G) A) and D)

Question 10

The muscle tone of the __________ along the colon contracts it lengthwise,causing its walls to bulge and form pouches called __________.

Accepted Answer

A)  circular folds; ceca
B)  taeniae coli; haustra
C)  haustra; taeniae coli
D)  internal sphincters; omental (epiploic)  appendages
E)  internal sphincters; cecaF) All of the above
G) C) and D)

Question 11

The brush borders of intestinal absorptive cells contain numerous goblet cells.

Accepted Answer

A) True 
 B)False

Question 12

The swallowing center is located in the __________.

Accepted Answer

A)  mouth
B)  oropharynx
C)  esophagus
D)  medulla oblongata
E)  enteric nervous systemF) A) and B)
G) A) and C) D

Question 13

The __________ stores excess glucose and releases it into the blood when needed.

Accepted Answer

A)  pancreas
B)  stomach
C)  liver
D)  spleen
E)  small intestineF) A) and B)
G) B) and D)

Question 14

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

Accepted Answer

A)  Water
B)  Vitamins
C)  Proteins
D)  Minerals
E)  CholesterolF) C) and E)
G) B) and C)

Question 15

The liver is the body's largest gland.

Accepted Answer

A) True 
 B)False  True

Question 16

The oral phase of swallowing is under __________ control and the pharyngo-esophageal phase is __________.

Accepted Answer

A)  central nervous system; also controlled by the central nervous system
B)  central nervous system; controlled by autonomic reflexes
C)  autonomic nervous system; controlled by autonomic reflexes
D)  voluntary; also voluntary
E)  involuntary; also involuntaryF) A) and B)
G) A) and C)

Question 17

The enzyme(s) called __________ break(s) down the substrate called __________.

Accepted Answer

A)  lactase; glucose
B)  peptidases; proteins
C)  lipases; micelles
D)  lactose; lactase
E)  nucleases; nucleotidesF) A) and E)
G) A) and B)

Question 18

The __________ synthesizes bile acids by metabolizing __________.

Accepted Answer

A)  duodenum; neutral fats
B)  ileum; bilirubin
C)  gallbladder; cholesterol
D)  pancreas; bile salts
E)  liver; cholesterolF) All of the above
G) B) and E)

Question 19

Which of the following is not an accessory organ of digestion?

Accepted Answer

A)  Tongue
B)  Liver
C)  Pancreas
D)  Salivary glands
E)  SpleenF) C) and E)
G) A) and B)

Question 20

Bacteria constitute about __________% of the dry weight of the feces.

Accepted Answer

A)  2
B)  14
C)  30
D)  55
E)  80F) A) and C)
G) A) and B) C

Exam 25: The Digestive System

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

Correct AnswerverifiedShow Answer

Which of the following enzymes functions at the lowest pH?

Correct AnswerverifiedShow Answer

The movement of colonic contents from one puckered section to another is called __________.

Correct AnswerverifiedShow Answer

Several digestive enzymes are secreted as zymogens because __________.

Correct AnswerverifiedShow Answer

The physiological process that moves a nutrient from the outside of the body to the inside is called __________.

Correct AnswerverifiedShow Answer

Which of the following is not a function of gastric hydrochloric acid (HCl) ?

Correct AnswerverifiedShow Answer

Absorption of many nutrients starts in the stomach.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Of the following components of bile,only __________ has/have a digestive function.

Correct AnswerverifiedShow Answer

The muscle tone of the __________ along the colon contracts it lengthwise,causing its walls to bulge and form pouches called __________.

Correct AnswerverifiedShow Answer

The brush borders of intestinal absorptive cells contain numerous goblet cells.

Correct AnswerverifiedShow Answer

The swallowing center is located in the __________.

Correct AnswerverifiedD

The __________ stores excess glucose and releases it into the blood when needed.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The liver is the body's largest gland.

Correct AnswerverifiedTrue

The oral phase of swallowing is under __________ control and the pharyngo-esophageal phase is __________.

Correct AnswerverifiedShow Answer

The enzyme(s) called __________ break(s) down the substrate called __________.

Correct AnswerverifiedShow Answer

The __________ synthesizes bile acids by metabolizing __________.

Correct AnswerverifiedShow Answer

Which of the following is not an accessory organ of digestion?

Correct AnswerverifiedShow Answer

Bacteria constitute about __________% of the dry weight of the feces.

Correct AnswerverifiedC

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The muscle tone of the along the colon contracts it lengthwise,causing its walls to bulge and form pouches called .

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The oral phase of swallowing is under control and the pharyngo-esophageal phase is .

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The enzyme(s) called break(s) down the substrate called .

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The synthesizes bile acids by metabolizing .

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