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Chapter 18: Questions With Answers

THE DIGESTIVE SYSTEM

1. The digestion of protein involves all of these except:
a. pepsin from the stomach
b. chemical digestion
c. increasing surface area
*d. mechanical digestion

2. The capillary networks and lacteals in the villi of the small intestine are important for:
*a. absorption of nutrients
b. chemical digestion
c. increasing surface area
d. mechanical digestion

3. A high fiber diet reduce your risk of:
a. diabetes
b. diverticulitis
c. colon cancer
d. irritable bowel syndrome
*e. all of the above

4. The pyloric region of the stomach secretes all of the following EXCEPT:
a. G cells
b. Chief cells
c. Goblet cells
*d. Parietal cells
e. all of these are secreted in the pylorus

5. Large amounts of undigested lactose in the intestine causes which of the following:
a. diarrhea
b. cramps
c. constipation
d. brain freeze
*e. a and b only

6. The other day as I sat on the toilet my rectal valves opened. As this happened, I eliminated what?
a. cellulose
b. undigested material
c. water
d. bacteria
*e. all of the above

7. What is absorbed by osmosis following the absorption of minerals?
*a. water
b. sodium
c. vitamin B12
d. all of the above

8. The hepatic portal takes_____to the liver that is absorbed through the small intestine.
a. amino acids
b. pancreatic enzyme
*c. blood
d. proteins

9. Cholera causes diarrhea due to a chemical called?
a. celiac sprue
*b. enterotoxin
c. vibrio cholera
d. bile canaliculus

10. What types of contractions occur in the small intestine?
a. segmentation
b. peristalsis
c. gastroesophageal
d. both b and c
*e. both a and b

11. There is a general assumption that everything we eat is absorbed through the intestines. That is not entirely true. What are the only items that are absorbed through the stomach?
a. ibuprofen and lactose
*b. alcohol and aspirin
c. acetaminophen and potassium
d. breast milk and baking soda
e. water and vitamin B-12

12. Ulcers are caused by:
a. eating large amounts of spicy foods
b. stress
*c. H-pylori
d. both a & b
e. all of the above

13. At the first stages of digestion, food particles are mixed with saliva, which contains the enzyme salivary amylase. What is salivary amylase used for?
a. to neutralize hydrochloric acid that enters the esophagus from the stomach
b. to break down proteins in the duodenum
c. to assist the bile as an extra surfactant
*d. to catalyse the partial digestion of starch prior to deglutition
e. to sent a message to the enteric nervous system to commence digestion

14. What is the ph level of gastric juices?
*a. 1-3
b. 2-4
c. 3-6
d. 8-10
e. 11-13

15. Mechanical digestion includes all of the following except:
a. chewing
*b. conversion of starch to maltose
c. emulsification of fat by bile salts
d. contractions of the stomach

16. The functions of saliva include all of these except:
a. taste
b. swallowing
c. starch digestion
*d. protein digestion

17. In the gastric mucosa, the parietal cells secrete:
*a. hydrochloric acid
b. pepsin
c. pepsinogen
d. complete gastric juice

18. After eating my mothers home made burritos, I explained to her that when the burrito reaches my stomach secretion of my gastric juice will be stimulated by ________ which is a hormone.
a. epinephrine
b. secretin
*c. gastrin
d. cholecystokinin

19. By the process of transmination, the liver synthesizes the:
a. enzymes for detoxification
*b. non-essential amino acids
c. essential amino acids
d. clotting factors

20. While I was searching for the Frill-necked Lizard I felt the urge to defecate. The stimulus for the defecation reflex is:
a. contraction of the rectum
b. contraction of the internal anal sphincter
*c. stretching of the rectum
d. relaxation of the internal anal sphincter

21. The cells of the liver that phagocytize pathogens are:
a. macrophages
b. Kupffer Cells
*c. both a and b are correct
d. neither a nor b is correct

22. The liver is able to detoxify potentially harmful substances by means of the synthesis of specific :
a. plasma proteins
b. lipoproteins
c. steroids
*d. enzymes

23. What do sodium, fatty acids, and vitamin A have in common?
*a. they are not enzymatically modified prior to absorption into the bloodstream
b. they cross the apical membranes of enterocytes by simple diffusion
c. they are transported into the blood capillaries in the villi
d. they are all hydrophilic
e. all of the above

MHennen	Latest page update: made by MHennen , Nov 30 2007, 1:38 PM EST (about this update About This Update Edited by MHennen view changes - complete history)
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