1) Which of the following is not an accessory organ of digestion?
a. Esophagus
b.Pancreas
c. Gallbladder
d.Liver
e. Salivary glands
2) Salivary amylase partially digests which of the following?
a. Lipids
b. Proteins
c. Polysaccharides
d. Amino acids
3) The digestive action of the stomach produces a liquid containing protein fragments, fat droplets,
polysaccharides, etc. called:
a. Intestinal juice
b. Chyme
c. Micelles
d. Chylomicrons
4) The organ in which protein digestion begins is the:
a. Mouth
b. Esophagus
c. Stomach
d. Small intestine
5) The small intestine is divided into 3 segments; most absorption of nutrients takes place in the:
a. Ileum
b. Ileum and duodenum
c. Duodenum and jejunum
d. Jejunum and ileum
6) The myenteric nerve plexus is located in the:
a. Mucosa
b. Submucosa
c. Muscularis externa
d. Serosa
7) Functions of HCl in the stomach include:
a. Killing bacteria
b. Digestion of proteins
c. Dissolving particulate matter in food
8) The type of macromolecule that serves as fiber is:
a. polysaccharide.
b. protein.
c. nucleotide.
d. lipid.
9) Which of the following components of bile serve as emulsifying agents:
a. Bile salts
b. phospholipids (lecithin)
c. Cholesterol
d. Bicarbonate ions
e. Bile pigments
10) Which of the following best describes a lacteal?
a. A vascular capillary in the villus of the small intestine.
b. An arteriole in the villus of the small intestine.
c. A blind-end lymphatic vessel.
d. A blind-end venule.
11) The breakdown of protein molecules into peptide fragments by pepsin occurs in the:
a. Small intestine.
b. Stomach.
c. Large intestine
12) Proteolytic enzymes secreted by the pancreas include all but which of the following:
a. Carboxypeptidase
b. Trypsin
c. Chymotrypsin
d. Aminopeptidase
13) Colipase is use to hold lipase onto the:
a. Micelle.
b. Chylomicron.
c. Lipid droplet.
d. Emulsifying agent.
14) Gastrin:
a. Stimulates acid secretion by the stomach
b. Stimulates motility in the stomach
c. Is made and secreted by cells in the antrum of the stomach.
15) All of the following stimulate the secretion of acid by the parietal cell except:
a. Histamine
b. Gastrin
c. Somatostatin
d. Acetylcholine
16) Which of the following influences on HCl secretion by the parietal cell is blocked by drugs like Tagamet
and Zantac?
a. Gastrin
b. Ach
c. Somatostatin
d. Histamine
17) Which of the following cells of the stomach secretes pepsinogen?
a. Parietal cell
b. Chief cell
c. Mucus neck cells
d. None of the above
18) Which of the following cells of the stomach secretes intrinsic factor?
a. Parietal cell
b. Chief cell
c. Mucous neck cells
d. None of the above
19) All of the following stimulate increased production of HCl except:
a. Sight, smell, taste of food
b. Gastric distension
c. Presence of peptides in the stomach
d. Increased hydrogen ion concentration in the small intestine
20) Heartburn is a result of the incompetence of which of the following sphincters:
a. Sphincter of Oddi
b. Upper esophageal sphincter
c. Duodenal sphincter (pylorus)
d. Lower esophageal sphincter
21) Which of the following are sources of zymogens?
a. Esophagus
b. Liver
c. Pancreas
d. stomach
22) CCK secretion is stimulated by:
a. The presence of peptides in the stomach.
b. The presence of amino acids and fatty acids in the small intestine.
c. Distension of the stomach.
d. Gastrin release in the stomach.
e. Secretin release by the small intestine.
23) CCK:
a.
b.
c.
d.
Stimulates enzyme secretion by the pancreas.
Inhibits gallbladder contraction.
Stimulates acid secretion by the stomach.
Potentiates the effect of Secretin
24) Secretin secretion is stimulated by:
a. Acid from stomach arriving in the small intestine.
b. Gastrin.
c. CCK.
d. Distension of the small intestine.
25) Secretin:
a. Stimulates gallbladder contraction.
b. Stimulates acid secretion by the stomach.
c. Stimulates bicarbonate secretion from the pancreas.
d. Stimulates motility in the stomach.
26) Bicarbonate is secreted by:
a. Hepatocytes in the liver.
b. Epithelial bile duct cells in the liver.
c. Exocrine cells in the pancreas
d. Pancreatic duct cells in the pancreas.
27) In the digestion of lipids, which of the following enters the lacteal?
a. Lipid droplet
b. Micelle
c. Emulsion droplet
d. Chylomicron
28) The major function of the large intestine is
a. Breakdown of erythrocytes
b. Absorb water from lumen
c. Secrete bicarbonate to neutralize stomach acid
29) Which types of receptors are found along the alimentary canal?
a. Mechanoreceptors
b. Osmoreceptors
c. Chemoreceptors
30) Enteroendocrine cells secrete
a. Hormones
b. Zymogens
c. Acid
d. bicarbonate
31) If Na+/K+ ATPases in the basolateral membranes of enterocytes were poisoned so that they no longer
functioned, the consequences would be
a. Simple sugars would not be absorbed
b. Amino acids would not be absorbed
c. Lipids would not be absorbed
d. Diarrhea.
32) Which of the following phases of hydrochloric acid secretion is mediated by the sight, smell, and taste of
food along with chewing?
a. The cephalic phase
b. The gastric phase
c. The intestinal phase.
33) Age-associated loss of lactase is associated with which of the following in persons who develop lactose
intolerance:
a. Constipation
b. Bile stones
c. Diarrhea
d. Excessive gas