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Chapter 24: Alimentary System Infections
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1
The salivary glands secrete many substances that inhibit bacterial growth. One of these substances breaks down starches present in foods and helps prevent tooth decay. This substance is ________________.
A)amylase.
B)lysozyme.
C)lactoferrin.
D)pepsin.
2
This segment of the alimentary system uses a process called peristalsis to move liquid and food.
A)mouth.
B)esophagus.
C)stomach.
D)pancreas.
3
Although only 8 to 9 feet long, this segment of the alimentary system has an enormous surface area and reabsorbs approximately 9 liters of fluid per day.
A)stomach.
B)liver.
C)large intestine.
D)small intestine.
4
The most complex and diverse flora of the human is found on or in the
A)mouth.
B)stomach.
C)large intestine.
D)skin.
5
The smallest number of microorganisms reside in the
A)mouth.
B)small intestine.
C)skin.
D)large intestine.
6
The most common bacterial disease of humans occurs in the
A)small intestine.
B)large intestine.
C)mouth.
D)stomach.
7
An organism virtually necessary for tooth decay to occur is
A)Streptococcus mutans.
B)Streptococcus agalactiae.
C)Staphylocccus aureus.
D)none of the above.
8
This disease, also known as Vincent's disease, is an acute form of periodontitis
A)gingivitis.
B)scalant.
C)dental caries.
D)trench mouth.
9
The organism suspected as the causative agent of the disease in question #8 is a
A)virus.
B)protozoan.
C)fungus.
D)spirochete.
10
This acute viral disease is marked by fever, loss of appetite and headache. It may invade the parotid glands making it difficult to talk or chew.
A)mumps.
B)measles.
C)chickenpox.
D)herpes.
11
This term is given to diarrheal illnesses when pus and blood are present in the feces.
A)gastroenteritis.
B)dysentery.
C)enteric fever.
D)none of the above.
12
Which of the following account for most bacterial intestinal infections?
A)Vibrio.
B)Campylobacter.
C)Enterobacteria.
D)All of the above.
13
The most common source of cholera infections is through
A)soil.
B)the bite of a rat flea.
C)fecally contaminated water.
D)spoiled food.
14
A biochemical characteristic of Escherichia coli that helps to distinguish it from the shigellas and salmonellas is its ability to
A)ferment glucose.
B)produce oxidase.
C)ferment lactose.
D)none of the above.
15
These viruses are the cause of almost half of the cases of viral gastroenteritis in the United States.
A)rotaviruses.
B)Norwalk viruses.
C)hepatitis A viruses.
D)hepatitis B viruses.
16
Which of the following could be a source for transmission of HBV?
A)needle stick.
B)sexual intercourse.
C)body piercing.
D)A and B are correct.
E)A, B, and C are correct.
17
This disease is the most commonly identified water borne illness in the United States.
A)salmonellosis.
B)shigellosis.
C)cholera.
D)giardiasis.
18
Hepatitis C is caused by
A)a virus.
B)flatworms.
C)protozoa.
D)bacteria.
19
Cryptosporidiosis is
A)not responsible for travelers' diarrhea.
B)easily treated with penicillin.
C)transmitted by a protozoan.
D)none of the above.
20
This organism has been associated with peptic ulcers of the duodenum
A)Streptococcus mutans.
B)Salmonella typhi.
C)Escherichia coli.
D)Helicobacter pylori.
21
Very fine filters are often used to purify drinking water. These filters would be least effective against controlling the following alimentary tract disease.
A)Giardiasis.
B)Cholera.
C)Rotavirus.
D)Salmonella.
E)Cryptosporidiosis.
22
Over fifty parents and children developed slight fever and vomiting at a high school football game. Most of them developed a watery diarrhea. All the affected people purchased canned soda stored in a large chest filled with ice. Which of the following was the most likely culprit causing the disease?
A)Rotavirus.
B)Cholera.
C)Cyclospora.
D)Giardiasis.
E)Salmonella.
23
All of the following are probably important to the cholera-causing ability of Vibrio cholera EXCEPT:
A)It attaches firmly to small intestinal epithelium.
B)It produces cholera toxin.
C)lysogenic conversion.
D)acid resistance.
E)It survives in the sea in association with zooplankton.
24
Cholera was major cause of illness and death for pioneers crossing the United States in the 1800s. What was the main reason that cholera was so common?
A)They usually ate food that was not refrigerated.
B)They regularly drank untreated water.
C)They disposed of their bodily wastes along the roadside.
D)They regularly ate uncooked foods.
E)They had no heating or cooling to protect from the harsh weather.
25
High sugar diets contribute to tooth decay and gum disease because of which of the following reasons?
A)Sugars are acidic.
B)Sugar eats away at the tooth's enamel.
C)Sugar discourages the normal flora of the mouth.
D)Sugar causes autoimmune attack of the gums.
E)Sugar encourages the growth and activity of bacteria in the mouth.





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