Self-Study Questions

Digestion

 

1. A tubular structure shared by both the respiratory tractand the digestive alimentary canal is the:

1. pharynx

2. larynx

3. glottis

4. epiglottis

5. none of the above

 

2. The large intestine has a large amount of villi?

1. true

2. false

 

3. The pH in the stomach is:

1. 1-3

2. 7.4

3. 12-14

4. 2 - 4

5. 7.0

 

4. Because of the low pH in the stomach, which enzyme is veryactive in this area?

1. Pepsin

2. Lipase

3. Salivary Amylase

4. Carboxypeptidase

5. none of the above

 

5. The esophaghus is lined with:

1. Columnar epithelium

2. Simple squamous epithelium

3. Stratified squamous epithelium

4. Smooth muscle only

5. none of the above

 

6. The muscle layer of the stomach is composed of 3 layersof smooth muscle, from innermost to outer most they are:

1. circular, oblique, longitudinal

2. oblique, circular, longitudinal

3. longitudinal, oblique, circular

4. circular, longitudinal, oblique

5. none of the above

 

7. What is the digestive enzyme in the mouth?

1. Chymotypsin

2. Salivary amylase

3. Pepsin

4. Digestive amylase

5. none of the above

 

8. In which layer of the digestive tract are most of the bloodvessels and nerves found?

1. mucus lining

2. submucus coat

3. muscular coat

4. fibroserous coat

5. lumen

 

9. Which statement (s) referring to the large intestine is(are)incorrect?

1. villi are less numerous than in the small intestine

2. Peyer's Patches are clearly visible under the microscope

3. site of taenia coli

4. has fatty appendages

5. 1 and 2

 

10. The greatest amount of digestion and absorption occurs:

1. stomach

2. ilium

3. duodenum

4. transverse colon

5. jejunum

 

11. The cardiac region is located at the beginning of the:

1. pharynx

2. jejunum

3. rectum

4. stomach

5. none of the above

 

12. The appendix is attached to the:

1. duodenum

2. sigmoid colon

3. esophagus

4. cecum

5. 1 and 2

 

13. Which of the following statements about glucose isn't true?

1. it is converted into glycogen into the liver

2. glucose is converted to fat for storage

3. it's primary function is to supply amino acids

4. 1 and 2

5. all of the above

 

14. Salivary amylase splits starch best at a pH of 2.5.

1. true

2. false

 

15. Myenteric plexus is located:

1. in the submucus layer of the G.I. tract

2. in the large intestine only

3. between circular and longitudinal muscles of G.I. tract

4. only in oblique muscle of stomach to aid in mixing

5. none of the above

 

16. Villi are most numerous in:

1. stomach

2. duodenum

3. ileum

4. large intestine

5. jejunum

 

17. The primary function of Brunner's glands is:

1. to secrete enzymes

2. secrete hormones

3. secrete mucus

4. to produce lymph

5. 1 and 3

 

18. Chemical activity in the stomach depends primarily on thesecretion of which enzymes?

1. trypsin

2. pepsin

3. chymotrypsin

4. all of the above

5. 1 and 3

 

19. Amino acids are linked by peptide bonds when ____ is removed.

1. carbon

2. hydrogen

3. H2O

4. oxygen

5. nitrogen

 

20. The surface area for digestion in the small intestine isincreased by:

1. plica circularis

2. epiploic appendages

3. villi

4. microvilli

5. all except 2

 

21. The connection of common bile duct and principal ductsforms the:

1. Duodenal papilla

2. Chyme

3. Crypt of Lieberkuhm

4. Brunner's gland

5. Ampulla of Vater (hepatic pancreatic ampulla)

 

22. Bile is produced in:

1. gall bladder

2. pancreas

3. liver

4. hepatic duct

5. stomach

 

 

23. The exit opening of the stomach is known as:

1. Cecum

2. Ileum

3. Pyloric valve

4. Rectum

5. Hepatic duct

 

24. The duct that drains the gall bladder is known as:

1. cystic duct

2. hepatic duct

3. pancreatic duct

4. fundus

5. none of the above

 

25. Which statements are true of the gall bladder?

1. it stores and concentrates bile

2. bile is produced here

3. a membraneous sac with average capacity of 40-50 ml

4. all of the above

5. 1 and 3

 

26. In sequence, the four main layers of the wall of the digestivetube are:

1. mucosa, submucosa, serosa, muscular

2. serosa, mucosa, submucosa, muscular

3. submucosa, mucosa, muscular, serosa

4. mucosa, submucosa, muscular, serosa

5. none of the above

 

27. Most digestion takes place in the:

1. duodenum

2. stomach

3. jejunum

4. gastric pit

5. Crypt of Lieberkuhn

 

28. Enzymes are produced inactive inside the cell but becomeactive outside the cell because:

1. that's the only way the body knows how to produce the enzymes

2. if the cell produces an active enzyme inside itself, theenzyme will destroy the cell

3. the inactive enzyme will become active when it comes incontact with food material

4. enzymes are active both inside and outside of the cell

5. all of the above

 

29. What is the primary function of the esophagus?

1. food reservoir

2. secretes enzymes

3. conveys food to the stomach

4. aids in swallowing

5. stimulates the parietal cells to secrete hydrochloric acid

 

30. Peyer's Patches are found in the:

1. jejenum

2. duodenum

3. stomach

4. ileum

5. esophagus

 

31. As pH decreases H+ concentration:

1. increases

2. decreases

3. is stable

4. first increases then decreases

5. decreases then increases

 

ANSWERS:

1-1, 2-2, 3-1, 4-1, 5-3, 6-2, 7-2, 8-2, 9-5, 10-3, 11-4, 12-4,13-3, 14-2, 15-3, 16-2, 17-3, 18-2, 19-3, 20-5, 21-5, 22-3, 23-3,24-1, 25-5, 26-4, 27-1, 28-2, 29-3, 30-4, 31-1