Deck 35: Gastrointestinal Function

Question 1

The propulsive movement of the GI tract is called

A) peristalsis.
B) transmission.
C) contraction.
D) constriction.

Answer 1

peristalsis.

Question 2

Parasympathetic stimulation of the stomach would

A) decrease motility.
B) decrease hydrogen chloride secretion.
C) inhibit acidity.
D) stimulate motility.

Answer 2

stimulate motility.

Question 3

The action of bile is to

A) emulsify fats.
B) digest cellulose.
C) convert sucrose.
D) release free amino acids.

Answer 3

emulsify fats.

Question 4

The structure and secretions of the salivary gland most closely resemble those of the

A) gastric gland.
B) exocrine pancreas.
C) liver.
D) gallbladder.

Question 5

Most of the parasympathetic innervation of the GI tract is supplied by the

A) hypoglossal nerves.
B) enteric nervous system.
C) vagus nerves.
D) celiac ganglia.

Question 6

Pancreatic secretions are high in

A) hydrochloric acid.
B) bicarbonate ions.
C) intrinsic factor.
D) secretin.

Question 7

Older individuals may experience which change in the mouth?

A) Increase in salivation
B) Increase in taste for salt
C) Increase in the number of papillae
D) Increased exposure of dentin

Question 8

Which enzyme assists with protein digestion?

A) Amylase
B) Chymotrypsin
C) Lactase
D) Lipase

Question 9

Which is associated with contraction of the gallbladder?

A) Cholecystokinin
B) Morphine
C) Norepinephrine
D) Gastrin

Question 10

Failure of normal partitioning between the foregut and midgut can lead to a congenital condition known as

A) tracheoesophageal fistula.
B) esophageal atresia.
C) intestinal atresia.
D) anal agenesis.

Question 11

The primary stimulus for pancreatic secretion is

A) gastrin.
B) histamine.
C) acetylcholine.
D) secretin.

Question 12

Chief cells secrete

A) pepsinogen.
B) hydrogen chloride.
C) intrinsic factor.
D) gastrin.

Question 13

Brush-border enzymes are produced by ________ cells.

A) pancreatic acinar
B) gastric mucosa
C) intestinal epithelial
D) goblet

Question 14

Which statement regarding pepsin is true?

A) It is secreted by parietal cells in gastric pits.
B) It is secreted as an inactive proenzyme.
C) It accomplishes most of the digestion of dietary protein.
D) It is permanently denatured by a pH less than 4.0.

Question 15

The portion of the stomach that controls gastric emptying is the

A) fundus.
B) body.
C) antrum.
D) pylorus.

Question 16

Absorption of glucose and amino acids across the intestinal epithelium occurs by

A) endocytosis.
B) ATP-driven transporters.
C) sodium-dependent carriers.
D) passive diffusion.

Question 17

Most nutrient digestion and absorption occurs in the

A) stomach.
B) small intestine.
C) large intestine.
D) cecum.

Question 18

How much fluid is secreted from the intestinal glands daily?

A) 1/2 L
B) 1 L
C) 2 L
D) 4 L

Question 19

Which can be absorbed through the intestinal epithelia without further digestion?

A) Sucrose
B) Lactose
C) Glucose
D) Glycogen

Question 20

The sympathetic nerve endings in the GI tract secrete

A) acetylcholine.
B) histamine.
C) gastrin.
D) norepinephrine.

Question 21

Which are major pairs of salivary glands? (Select all that apply.)

A) Parotid
B) Parietal
C) Submandibular
D) Sublingual
E) Pituitary

Question 22

Carbohydrates are absorbed in the form of

A) polysaccharides.
B) disaccharides.
C) monosaccharides.
D) monoglycerides.