1) - Wofford College



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

Esophagus

Pancreas

Gallbladder

Liver

Salivary glands

Salivary amylase partially digests which of the following?

Lipids

Proteins

Polysaccharides

Amino acids

The digestive action of the stomach produces a liquid containing protein fragments, fat droplets, polysaccharides, etc. called:

Intestinal juice

Chyme

Micelles

Chylomicrons

The organ in which protein digestion begins is the:

Mouth

Esophagus

Stomach

Small intestine

The small intestine is divided into 3 segments; most absorption of nutrients takes place in the:

Ileum

Ileum and duodenum

Duodenum and jejunum

Jejunum and ileum

The myenteric nerve plexus is located in the:

Mucosa

Submucosa

Muscularis externa

Serosa

Functions of HCl in the stomach include:

Killing bacteria

Digestion of proteins

Dissolving particulate matter in food

The type of macromolecule that serves as fiber is:

polysaccharide.

protein.

nucleotide.

lipid.

Which of the following components of bile serve as emulsifying agents:

Bile salts

phospholipids (lecithin)

Cholesterol

Bicarbonate ions

Bile pigments

Which of the following best describes a lacteal?

A vascular capillary in the villus of the small intestine.

An arteriole in the villus of the small intestine.

A blind-end lymphatic vessel.

A blind-end venule.

The breakdown of protein molecules into peptide fragments by pepsin occurs in the:

Small intestine.

Stomach.

Large intestine

Proteolytic enzymes secreted by the pancreas include all but which of the following:

Carboxypeptidase

Trypsin

Chymotrypsin

Aminopeptidase

Colipase is use to hold lipase onto the:

Micelle.

Chylomicron.

Lipid droplet.

Emulsifying agent.

Gastrin:

Stimulates acid secretion by the stomach

Stimulates motility in the stomach

Is made and secreted by cells in the antrum of the stomach.

All of the following stimulate the secretion of acid by the parietal cell except:

Histamine

Gastrin

Somatostatin

Acetylcholine

Which of the following influences on HCl secretion by the parietal cell is blocked by drugs like Tagamet and Zantac?

Gastrin

Ach

Somatostatin

Histamine

Which of the following cells of the stomach secretes pepsinogen?

Parietal cell

Chief cell

Mucus neck cells

None of the above

Which of the following cells of the stomach secretes intrinsic factor?

Parietal cell

Chief cell

Mucous neck cells

None of the above

All of the following stimulate increased production of HCl except:

Sight, smell, taste of food

Gastric distension

Presence of peptides in the stomach

Increased hydrogen ion concentration in the small intestine

Heartburn is a result of the incompetence of which of the following sphincters:

Sphincter of Oddi

Upper esophageal sphincter

Duodenal sphincter (pylorus)

Lower esophageal sphincter

Which of the following are sources of zymogens?

Esophagus

Liver

Pancreas

stomach

CCK secretion is stimulated by:

The presence of peptides in the stomach.

The presence of amino acids and fatty acids in the small intestine.

Distension of the stomach.

Gastrin release in the stomach.

Secretin release by the small intestine.

CCK:

Stimulates enzyme secretion by the pancreas.

Inhibits gallbladder contraction.

Stimulates acid secretion by the stomach.

Potentiates the effect of Secretin

Secretin secretion is stimulated by:

Acid from stomach arriving in the small intestine.

Gastrin.

CCK.

Distension of the small intestine.

Secretin:

Stimulates gallbladder contraction.

Stimulates acid secretion by the stomach.

Stimulates bicarbonate secretion from the pancreas.

Stimulates motility in the stomach.

Bicarbonate is secreted by:

Hepatocytes in the liver.

Epithelial bile duct cells in the liver.

Exocrine cells in the pancreas

Pancreatic duct cells in the pancreas.

In the digestion of lipids, which of the following enters the lacteal?

Lipid droplet

Micelle

Emulsion droplet

Chylomicron

The major function of the large intestine is

Breakdown of erythrocytes

Absorb water from lumen

Secrete bicarbonate to neutralize stomach acid

Which types of receptors are found along the alimentary canal?

Mechanoreceptors

Osmoreceptors

Chemoreceptors

Enteroendocrine cells secrete

Hormones

Zymogens

Acid

bicarbonate

If Na+/K+ ATPases in the basolateral membranes of enterocytes were poisoned so that they no longer functioned, the consequences would be

Simple sugars would not be absorbed

Amino acids would not be absorbed

Lipids would not be absorbed

Diarrhea.

Which of the following phases of hydrochloric acid secretion is mediated by the sight, smell, and taste of food along with chewing?

The cephalic phase

The gastric phase

The intestinal phase.

Age-associated loss of lactase is associated with which of the following in persons who develop lactose intolerance:

Constipation

Bile stones

Diarrhea

Excessive gas

................
................

In order to avoid copyright disputes, this page is only a partial summary.

Google Online Preview   Download