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The Digestive System

46 Questions  I  By Dru31988
The Digestive System
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1.  Amino acids and monosaccharides are absorbed in the ____________, and fatty acids are absorbed in the _______________. 
A.
B.
C.
D.
E.
2.  . ______________ is a hormone, whereas ________________ is an enzyme. 
A.
B.
C.
D.
E.
3.  These are normally found in saliva except 
A.
B.
C.
D.
E.
4.  The ______________ gland is an extrinsic salivary gland; whereas the ______________ gland is an intrinsic salivary gland. 
A.
B.
C.
D.
E.
5.  Each of the following lists some of the tissue layers of the digestive tract. Which one has them in correct order from lumen to external surface? 
A.
B.
C.
D.
E.
6.  Infants have ________________ deciduous teeth, whereas adults have ________________ permanent teeth. 
A.
B.
C.
D.
E.
7.   The small intestine is suspended from the abdominal wall by 
A.
B.
C.
D.
E.
8.  Bacterial flora carry out all of the following except 
A.
B.
C.
D.
E.
9.  Why are several digestive enzymes secreted as zymogens? 
A.
B.
C.
D.
E.
10.  Which of these nutrients is absorbed by the lacteals of the small intestine? 
A.
B.
C.
D.
E.
11.  . The buccal phase of swallowing is under _____________ control and the pharyngo-esophageal phase is ______________. 
A.
B.
C.
D.
E.
12.  The swallowing center is located in
A.
B.
C.
D.
E.
13.  Proteins are digested by different enzymes acting in the following sequence 
A.
B.
C.
D.
E.
14.  Which of these is not a component of the pancreatic juice? 
A.
B.
C.
D.
E.
15.  The organ that stores excess glucose and releases it later into the blood is 
A.
B.
C.
D.
E.
16.  The surface of the tongue is covered with ____________ stratified squamous epithelium, and has bumps called __________________, site of taste buds. 
A.
B.
C.
D.
E.
17.  The three most abundant classes of nutrients are 
A.
B.
C.
D.
E.
18.  Of the following components of bile, only _____________ has/have a digestive function. 
A.
B.
C.
D.
E.
19.  _____________ is associated with food stretching the stomach and activating myenteric and vagovagal reflexes, which in turn stimulate gastric secretions. 
A.
B.
C.
D.
E.
20.  ____________, which is secreted by ___________ cells, is necessary for Vitamin B12 absorption. 
A.
B.
C.
D.
E.
21.  The muscle tone of the ________________ along the colon contracts it lengthwise, causing its walls to bulge and form pouches called _______________. 
A.
B.
C.
D.
E.
22.  From superficial to deep, these are the structures found in a typical tooth. 
A.
B.
C.
D.
E.
23.  Hydrochloric acid (HCl) is secreted by ____________ cells. 
A.
B.
C.
D.
E.
24.  These are all accessory organ of the digestive system except 
A.
B.
C.
D.
E.
25.  A hepatic triad consists of 
A.
B.
C.
D.
E.
26.  ____________ is the physiological process that moves a nutrient from the outside to the inside of the body. 
A.
B.
C.
D.
E.
27.  Pancreatic enzymes are secreted in response to the hormone 
A.
B.
C.
D.
E.
28.  The ______________ of the small intestine is/are similar to the _________________ of the stomach. 
A.
B.
C.
D.
E.
29.  The enterogastric reflex serves to 
A.
B.
C.
D.
E.
30.  Which of the following enzymes functions at the lowest pH?  
A.
B.
C.
D.
E.
31.   Defecation is stimulated by 
A.
B.
C.
D.
E.
32.  Bacteria constitute about __________% of the dry weight of the feces
A.
B.
C.
D.
E.
33.  The small intestine has a very large absorptive surface associated with all these structures except 
A.
B.
C.
D.
E.
34.  Chemical digestion breaks down _____________ into __________________.
A.
B.
C.
D.
E.
35.  The ___________ regulates digestive tract motility, secretion, and blood flow and its neurons are found in the ____________. 
A.
B.
C.
D.
E.
36.  Lecithin prepares fats for hydrolysis by forming 
A.
B.
C.
D.
E.
37.  Carbohydrate digestion begins in the ______________, whereas protein digestion begins in the ______________. 
A.
B.
C.
D.
E.
38.  The migrating motor complex 
A.
B.
C.
D.
E.
39.  Acid reflux into the esophagus ("heartburn") is normally prevented by 
A.
B.
C.
D.
E.
40.  The _______________ synthesizes bile acids by metabolizing ____________________. 
A.
B.
C.
D.
E.
41.  The sodium-glucose trasnsport protein (SGLP)
A.
B.
C.
D.
E.
42.  These nutrients are all absorbed without being digested except 
A.
B.
C.
D.
E.
43.  Which of these is the site of contact digestion? 
A.
B.
C.
D.
E.
44.   The serous membranes that suspend the stomach and intestines from the abdominal wall are called 
A.
B.
C.
D.
E.
45.  ____________ transport lipids to the surface of the intestinal absorptive cells, which process them into _________________. 
A.
B.
C.
D.
E.
46.  Pepsinogen is produced by ____________ and is activated by ___________. 
A.
B.
C.
D.
E.
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