MASTERING MICROBIOLOGY CHAPTER 14
HOMEWORK
1. A patient's immune system is typically fully responsive during which of
the following stages of disease?
a. prodromal period
b. decline
c. incubation period
d. illness`: decline
2. An epidemiologist collects drinking glasses, tissues, and bed sheets
from the apartment of an individual infected with a particular disease. Which
of the following modes of transmission is being investigated for this
disease?
a. vector transmission
b. vehicle transmission
c. direct contact transmission
d. indirect contact transmission: indirect contact transmission
3. Endotoxins are also known as
a. interleukin-1.
b. Lipid A.
c. cytokines.
d. prostaglandins.: Lipid A.
4. When would endotoxins be released from a bacterial cell?
a. When the cell dies
b. During bacterial conjugation
c. When the cell attaches to a host cell in the human body
d. When the cell moves toward a energy source: When the cell dies
5. Which of the following would be the first sign of an infection that
resulted in the release of endotoxin?
a. Weakness
b. Pain
c. Nausea
d. Fever: Fever
6. Why is a release of endotoxin into the bloodstream potentially deadly?
a. It can lower blood pressure and cause the patient to go into shock.
b. It results in dehydration of the patient.
c. It causes necrosis of the liver.
d. Endotoxin can quickly enter the brain from the bloodstream, causing
brain damage.: It can lower blood pressure and cause the patient to go
into shock.
7. How are immune cells able to detect foreign pathogens?
a. They detect foreign, unfamiliar chemical substances released by the
, MASTERING MICROBIOLOGY CHAPTER 14
HOMEWORK
invad- ing cells.
b. They are able to detect structures on the surfaces of foreign cells that are
, MASTERING MICROBIOLOGY CHAPTER 14
HOMEWORK
not found in the host.
c.They can compare the DNA sequences from the foreign cells to host
DNA.: - They are able to detect structures on the surfaces of foreign
cells that are not found in the host.
8. How does a capsule help certain bacteria evade detection by the
immune system?
a. The capsule makes the bacterium too sticky to be phagocytosed by
the immune cells.
b. Capsules have the ability to destroy antibodies secreted by the
immune system.
c. Capsules allow the bacteria to stick together, creating a larger mass that
is too big for immune cells to engulf.
d.The capsule is composed of polysaccharides that are similar to those
found in the host; thus, the immune system does not recognize it as
foreign.: The capsule is composed of polysaccharides that are similar to
those found in the host; thus, the immune system does not recognize it
as foreign.
9. Which of the following microorganisms actually grows inside
the macrophage?
a. Legionella
b. Streptococcus pneumoniae
c. Shigella
d. Leishmania
e. Tuberculosis bacterium: Tuberculosis bacterium
10. How does the protozoan Trypanosoma evade detection by the
immune system?
a. It can resist oxidation inside macrophages.
b. It prevents phagosome-lysosome fusion.
c. It can change the surface antigens frequently, preventing the
immune system from tracking it.
d. It produces a capsule which is composed of polysaccharides similar to
those found in the host.: It can change the surface antigens frequently,
preventing the immune system from tracking it.
11. Which of the following statements regarding the demonstration of
the etiology of disease is FALSE?
a. The suspect agent must be the only potential pathogen present in
disease cases.
b. The suspect agent must be present in all cases of disease.
c. It must be possible to reisolate the suspect agent from the infected
HOMEWORK
1. A patient's immune system is typically fully responsive during which of
the following stages of disease?
a. prodromal period
b. decline
c. incubation period
d. illness`: decline
2. An epidemiologist collects drinking glasses, tissues, and bed sheets
from the apartment of an individual infected with a particular disease. Which
of the following modes of transmission is being investigated for this
disease?
a. vector transmission
b. vehicle transmission
c. direct contact transmission
d. indirect contact transmission: indirect contact transmission
3. Endotoxins are also known as
a. interleukin-1.
b. Lipid A.
c. cytokines.
d. prostaglandins.: Lipid A.
4. When would endotoxins be released from a bacterial cell?
a. When the cell dies
b. During bacterial conjugation
c. When the cell attaches to a host cell in the human body
d. When the cell moves toward a energy source: When the cell dies
5. Which of the following would be the first sign of an infection that
resulted in the release of endotoxin?
a. Weakness
b. Pain
c. Nausea
d. Fever: Fever
6. Why is a release of endotoxin into the bloodstream potentially deadly?
a. It can lower blood pressure and cause the patient to go into shock.
b. It results in dehydration of the patient.
c. It causes necrosis of the liver.
d. Endotoxin can quickly enter the brain from the bloodstream, causing
brain damage.: It can lower blood pressure and cause the patient to go
into shock.
7. How are immune cells able to detect foreign pathogens?
a. They detect foreign, unfamiliar chemical substances released by the
, MASTERING MICROBIOLOGY CHAPTER 14
HOMEWORK
invad- ing cells.
b. They are able to detect structures on the surfaces of foreign cells that are
, MASTERING MICROBIOLOGY CHAPTER 14
HOMEWORK
not found in the host.
c.They can compare the DNA sequences from the foreign cells to host
DNA.: - They are able to detect structures on the surfaces of foreign
cells that are not found in the host.
8. How does a capsule help certain bacteria evade detection by the
immune system?
a. The capsule makes the bacterium too sticky to be phagocytosed by
the immune cells.
b. Capsules have the ability to destroy antibodies secreted by the
immune system.
c. Capsules allow the bacteria to stick together, creating a larger mass that
is too big for immune cells to engulf.
d.The capsule is composed of polysaccharides that are similar to those
found in the host; thus, the immune system does not recognize it as
foreign.: The capsule is composed of polysaccharides that are similar to
those found in the host; thus, the immune system does not recognize it
as foreign.
9. Which of the following microorganisms actually grows inside
the macrophage?
a. Legionella
b. Streptococcus pneumoniae
c. Shigella
d. Leishmania
e. Tuberculosis bacterium: Tuberculosis bacterium
10. How does the protozoan Trypanosoma evade detection by the
immune system?
a. It can resist oxidation inside macrophages.
b. It prevents phagosome-lysosome fusion.
c. It can change the surface antigens frequently, preventing the
immune system from tracking it.
d. It produces a capsule which is composed of polysaccharides similar to
those found in the host.: It can change the surface antigens frequently,
preventing the immune system from tracking it.
11. Which of the following statements regarding the demonstration of
the etiology of disease is FALSE?
a. The suspect agent must be the only potential pathogen present in
disease cases.
b. The suspect agent must be present in all cases of disease.
c. It must be possible to reisolate the suspect agent from the infected
