Digestive System Q & A

Digestive System

1. The salivary enzyme amylase functions to digest

A. carbohydrates.

B. proteins.

C. fats.

D. all of the choices are correct.
2. Gastrin, which is secreted by stomach cells, functions to

A. inhibit the production of hydrochloric acid.

B. increase the secretions of the gastric glands.

C. change pepsin into pepsinogen.

D. initiate thecephalic phase of digestion.
3. The hormone called secretin functions to

A. convert trypsinogen into trypsin.

B. activate chymotrypsin.

C. stimulate the release of pancreatic fluid.

D. inhibit the action of pancreatic lipase.
4. The main part of the stomach is called the

A. fundic region.

B. pyloric region.

C. cardiac region.

D. None of the choicesare correct.
5. Which of the following is a protein-splitting enzyme found in pancreatic juice?

A. trypsin

B. zymogen

C. amylase

D. nuclease
6. The liver functions to

A. form glucose from noncarbohydrates.

B. store vitamin D.

C. destroy damaged red blood cells.

D. All of the choices are correct.
7. The correct sequence for the layers within the wall ofthe alimentary canal from inside to outside is

A. mucous membrane, muscular layer, serous layer, submucosa.

B. mucous membrane, submucosa, muscular layer, serous layer.

C. serous layer, muscular layer, mucous membrane, submucosa.

D. submucosa, mucous membrane, serous layer, muscular layer.
8. One of the major functions of the large intestine is to

A. secrete digestiveenzymes.

B. reabsorb water from chyme.

C. regulate the release of bile.

D. break down hemoglobin.
9. The teeth that are best adapted for biting off relatively large pieces of food are the

A. incisors.

B. cuspids.

C. bicuspids.

D. molars.
10. What constituent of bile has a digestive function?

A. bile salts

B. bile pigments

C. cholesterolD. electrolytes
11. Microorganisms promote the development of dental cavities by utilizing carbohydrates and producing by-products that are

A. alkaline.

B. acidic.

C. toxic.

D. electrolytes.
12. Cholecystokinin secretion from the intestinal wall is stimulated by the presence of

A. protein in the stomach.

B. protein in the small intestine.

C. fat in thestomach.

D. fat in the small intestine.
13. During the defecation reflex, the

A. diaphragm is lowered.

B. glottis is reopened.

C. abdominal wall muscles relax.

D. internal abdominal pressure is decreased.
14. A relatively new treatment in the management of gastric ulcers is a drug that inhibits the production of HCl in the stomach. If a person took this medication for along period, the digestion of which of the following would be affected the most?

A. carbohydrates

B. lipids

C. proteins

D. All of these would be affected.
15. Peristalsis occurs in the digestive tract

A. from the pharynx to the anus.

B. in the stomach and small intestine only.

C. in the small and large intestines only.

D. in the stomach, small intestine,and large intestine only.
16. Digestion of which of the following would be affected the most if the liver were severely damaged?

A. carbohydrates

B. lipids

C. proteins

D. All of these would be affected equally.
17. Because of their location, swollen palatine tonsils may interfere with

A. breathing.

B. swallowing.

C. both breathing and swallowing.

D.neither breathing nor swallowing.
18. Loss of teeth is most commonly associated with diseases of the

A. enamel.

B. dentin.

C. dental pulp and gums.

D. crown.
19. Heartburn is usually caused by effects of gastric juice on the

A. heart.

B. esophagus.

C. stomach.

D. small intestine.
20. Gastric and duodenal ulcers are usually caused by the action of...