Deck 39: Digestive System Processes: Chemical and Physical

Question 1

Which type of movement in the GI system propels food along the entire alimentary canal?

A)defecation
B)segmentation
C)swallowing
D)peristalsis

Answer 1

D

Question 2

When carbohydrates are digested, the following molecules can be absorbed: .

A)small oligosaccharides
B)monosaccharides, disaccharides, and small oligosaccharides
C)monosaccharides
D)disaccharides

Answer 2

C

Question 3

When proteins are digested, the following molecules can be absorbed: .

A)tripeptides
B)amino acids
C)dipeptides
D)amino acids, dipeptides, and tripeptides

Answer 3

D

Question 4

This test detects starch in solution.

A)litmus test
B)IKI (Lugol's iodine)test
C)Benedict's test

Question 5

Fat digestion results in .

A)monoglycerides
B)monoglycerides and fatty acids
C)glycerol
D)fatty acids

Question 6

The evidence that trypsin digested protein to amino acids is .

A)the presence of a yellow color in the test tube
B)the presence of a pink color in the test tube
C)a negative starch test
D)a positive Benedict's test

Question 7

Fats, in the presence of litmus (that indicates pH of the solution), are shown to be digested .

A)when the solution in the test tube turns pink (acidic)
B)when the solution in the test tube turns yellow (neutral)
C)when the solution in the test tube turns blue (alkaline)

Question 8

The end products of digestion of carbohydrates are .

A)oligosaccharides
B)monosaccharides
C)disaccharides

Question 9

Swallowing .

A)is voluntarily controlled in the mouth, pharynx, and esophagus
B)is initiated by the action of the tongue, is voluntarily controlled in the mouth, pharynx, and esophagus, and moves food, by segmental contractions, into the stomach
C)is initiated by the action of the tongue
D)moves food, by segmental contractions, into the stomach

Question 10

This enzyme, produced by the salivary glands, digests carbohydrates.

A)oligosaccharidase
B)sucrase
C)glucoamylase
D)amylase

Question 11

In the assay in which fat was digested, is the substrate, and is the hydrolase.

A)lipase, cream
B)trypsin, BAPNA
C)cream, lipase
D)BAPNA, trypsin

Question 12

The pancreas produces this protein- digesting enzyme.

A)trypsin
B)dipeptidase
C)pepsin

Question 13

Digestive enzymes .

A)are produced only within the GI tract
B)break down substrates by dehydration
C)are biological catalysts

Question 14

Amylase and starch are mixed and placed at 0 degrees. After the IKI test, the solution turns black. A Benedict's test yields a negative result. Was the starch digested? How do you know?

A)Some was digested; the starch test showed some starch and the Benedict's test showed some sugars.
B)No, the Benedict's test revealed no sugars in solution.
C)Yes, the starch test indicated that no starch remained, and the Benedict's test revealed the presence of sugars in solution.

Question 15

Peristaltic waves occur in all of the following organs except .

A)esophagus
B)stomach
C)pharynx
D)small intestine

Question 16

Which type of movement in the GI system is primarily responsible for moving chyme back and forth, mixing it with digestive juices and promoting the absorption of nutrients?

A)segmentation
B)peristalsis
C)swallowing
D)defecation

Question 17

Which of the following enzymes digests carbohydrates?

A)sucrase
B)amylase
C)lactase
D)amylase, lactase, and sucrase

Question 18

The digestive enzymes tested in the laboratory function best at this temperature.

A)37°C
B)98°C
C)0°C
D)50°C

Question 19

What causes the gastroesophageal sphincter to open to allow food to enter the stomach?

A)the arrival of the peristaltic wave at the stomach
B)the relaxation of the gastroesophageal sphincter associated with chewing of food
C)activity of the tongue in swallowing
D)the pressure of food against the gastroesophageal sphincter

Question 20

This protein- digesting enzyme works optimally at pH 1.5- 2.0. What is the enzyme, and where is it produced?

A)trypsin; pancreas
B)pepsin; pancreas
C)pepsin; stomach
D)trypsin; stomach

Question 21

This fat- digesting enzyme does the major work of digesting fats in the small intestine.

A)pepsin
B)amylase
C)ribonuclease
D)lipase

Question 22

Bile .

A)emulsifies fat, keeping tiny fat droplets suspended in the aqueous contents of the gut
B)is a digestive enzyme that hydrolyzes lipids, is an important catalyst for lipid hydrolysis, and emulsifies fat, keeping tiny fat droplets suspended in the aqueous contents of the gut
C)is a digestive enzyme that hydrolyzes lipids
D)is an important catalyst for lipid hydrolysis