The Digestive System

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