BSC 1005 Exam 5 questions with
complete solutions
The body's first line of defense against invading pathogens is the
a. heart b. platelet c. white blood cell d. lymph node e. skin - correct answer ✔✔skin
Which special white blood cells wander the interstitial fluid engulfing whatever bacteria and
virus-infected cells they encounter and recognize?
A) natural killer cells B) monocytes C) leukocytes
D) macrophages E) interferons - correct answer ✔✔macrophages
Which of the protein circulates in the blood and coats the surfaces of microbes to make them
more susceptible to engulfment by macrophages?
A) complement B) interferon C) prostaglandin D) antigen
E) pyrogen - correct answer ✔✔complement
What is the major function of natural killer cells?
A) to attack and kill pathogenic microorganisms in a nonspecific way
B) to attack virus-infected cells in a nonspecific way
C) to attack virus-infected cells in an antigen-specific way
D) to tag pathogenic microorganisms with antibodies
E) to phagocytize microorganisms that have been tagged with antibodies - correct answer ✔✔to
attack virus-infected cells in a nonspecific way
How are Complement proteins assist the immune response?
A) enhancing the effects of antibiotics
, B) coating the surface of microbes, thus making it easier for macrophages to phagocytize them
C) reducing inflammation D) all of the above E) none of the above - correct answer ✔✔coating
the surface of microbes, thus making it easier for macrophages to phagocytize them
Detection of interferon in a laboratory rat means that ______.
A) the rat has, or recently had, a viral infection
B) cancerous cells are present in the rat C) the rat's diet is deficient in calcium
D) the complement system is activated by exposure to an antigen E) none of the above - correct
answer ✔✔the rat has, or recently had, a viral infection
Which of the following is a means by which damage cell call for help or triggers our nonspecific
defense system?
A) active immunity B) inflammation C) passive immunity
D) cell-mediated immunity E) movement of erythrocytes to the affected site - correct answer
✔✔inflammation
When you cut yourself, the damaged cells immediately release which of the following chemical
alarm signals?
A) interferon B) complement C) histamine D) pyrogens
E) anti-interferon - correct answer ✔✔histamine
Which of the following is will NOT BE THE function of histamine?
A) causing local blood vessels to dilate
B) causing local blood vessels to become leakier
C) increasing blood flow to the area
D) increasing systemic blood pressure
E) causing local swelling of the tissue - correct answer ✔✔increasing systemic blood pressure
complete solutions
The body's first line of defense against invading pathogens is the
a. heart b. platelet c. white blood cell d. lymph node e. skin - correct answer ✔✔skin
Which special white blood cells wander the interstitial fluid engulfing whatever bacteria and
virus-infected cells they encounter and recognize?
A) natural killer cells B) monocytes C) leukocytes
D) macrophages E) interferons - correct answer ✔✔macrophages
Which of the protein circulates in the blood and coats the surfaces of microbes to make them
more susceptible to engulfment by macrophages?
A) complement B) interferon C) prostaglandin D) antigen
E) pyrogen - correct answer ✔✔complement
What is the major function of natural killer cells?
A) to attack and kill pathogenic microorganisms in a nonspecific way
B) to attack virus-infected cells in a nonspecific way
C) to attack virus-infected cells in an antigen-specific way
D) to tag pathogenic microorganisms with antibodies
E) to phagocytize microorganisms that have been tagged with antibodies - correct answer ✔✔to
attack virus-infected cells in a nonspecific way
How are Complement proteins assist the immune response?
A) enhancing the effects of antibiotics
, B) coating the surface of microbes, thus making it easier for macrophages to phagocytize them
C) reducing inflammation D) all of the above E) none of the above - correct answer ✔✔coating
the surface of microbes, thus making it easier for macrophages to phagocytize them
Detection of interferon in a laboratory rat means that ______.
A) the rat has, or recently had, a viral infection
B) cancerous cells are present in the rat C) the rat's diet is deficient in calcium
D) the complement system is activated by exposure to an antigen E) none of the above - correct
answer ✔✔the rat has, or recently had, a viral infection
Which of the following is a means by which damage cell call for help or triggers our nonspecific
defense system?
A) active immunity B) inflammation C) passive immunity
D) cell-mediated immunity E) movement of erythrocytes to the affected site - correct answer
✔✔inflammation
When you cut yourself, the damaged cells immediately release which of the following chemical
alarm signals?
A) interferon B) complement C) histamine D) pyrogens
E) anti-interferon - correct answer ✔✔histamine
Which of the following is will NOT BE THE function of histamine?
A) causing local blood vessels to dilate
B) causing local blood vessels to become leakier
C) increasing blood flow to the area
D) increasing systemic blood pressure
E) causing local swelling of the tissue - correct answer ✔✔increasing systemic blood pressure
