PCB4233 ASSIGNMENTS SPRING 2025 EXAM WITH
ALL CORRECT & 100% VERIFIED ANSWERS|
UPDATED TO PASS
Which of the following is not an observation of the "Super Fungus" scare?
a. The source of the scare was actually AIDS
b. Prolonged untreated HIV can cause a state of immunodeficiency
c. An overproduction/overstimulation of CD4+ T cells promoted immune system dysfunction
d. Opportunistic infections that were generally regulated by the immune system were now a threat -
Correct Answer- c. An overproduction/overstimulation of CD4+ T cells promoted immune system
dysfunction
In which of the following infectious diseases have vaccines been least effective?
a. HIV
b. Paralytic Polio
c. Smallpox
d. Mumps - Correct Answer- a. HIV
An example of passive immunity is when Chase transferred immunity to tuberculosis between guinea
pigs via WBC's - Correct Answer- passive immunity
Serum was observed to have which of the following effects during many of the early studies? -
Correct Answer- -neutralize toxins
-transfer immune state to unimmunized animals
-precipitate toxins
-agglutinate toxins
Who first observed the role of immunity in health and disease?
a. Thucydides
b. Snell
c. Hoffman
d. Pasteur - Correct Answer- a. Thucydides
Which of the following are roles of the immune system? - Correct Answer- -Promote mutualistic
microorganism interactions
-distinguish between foreign pathogens
-distinguish between self and foreign invaders
-distinguish between self and altered self
The targets of the influenze vaccine are ______ and ______ - Correct Answer- 1. Hemagglutinin
2. Neuraminidase
Which of the following statements are true regarding the adaptive immune system?
-major cell types would include phagocytes
-increase in magnitude with successive exposure
-constantly activated defense mechanisms
-T cells and B cells are major players
-response in days
, -respond essentially the same way to repeat infections
-respond in hours
-inducible
-tailor-made
-important for further activation of the immune system - Correct Answer- -increase in magnitude
with successive exposure
-T cells and B cells are major players
-response in days
-inducible
-tailor-made
Which of the following statements are true regarding the innate immune system?
-major cell types would include phagocytes
-increase in magnitude with successive exposure
-several constantly activated defense mechanisms
-T cells and B cells are major players
-response in days
-respond essentially the same way to repeat infections
-respond in hours
-inducible
-tailor-made
-important for further activation of the immune system - Correct Answer- -respond essentially the
same way to repeat infections
-respond in hours
-important for further activation of the immune system
-major cell types would include phagocytes
-several constantly activated defense mechanisms
What effect does the release of proinflammatory cytokines such as IL-1, IL-6, and TNF-a have? -
Correct Answer- -Initiate a fever that may negatively impact pathogen stability or ability to replicate
-further activate other cell types such as macrophages
Phagocytic cells have certain receptors that can recognize PAMPs or DAMPs
-True
-False - Correct Answer- -True
If a surface contained both calprotectin and psoriasin which pathogen will ikely be found on that
surface?
a. S. aureus
b. Both S. aureus and E. coli
c. Neither S. aureus and E. coli
d. E. coli - Correct Answer- c. Neither S. aureus nor E. coli
Which of the following statements is false regarding complement?
a. Opsonization, stimulation of inflammatory mediator, and lysis of microbes are some of
complement's functions
b. complement proteins are always active
c. complement activations follows a cascade mechanism
d. complement activation has several pathways that each begin with specific proteins - Correct
Answer- b. complement proteins are always active
ALL CORRECT & 100% VERIFIED ANSWERS|
UPDATED TO PASS
Which of the following is not an observation of the "Super Fungus" scare?
a. The source of the scare was actually AIDS
b. Prolonged untreated HIV can cause a state of immunodeficiency
c. An overproduction/overstimulation of CD4+ T cells promoted immune system dysfunction
d. Opportunistic infections that were generally regulated by the immune system were now a threat -
Correct Answer- c. An overproduction/overstimulation of CD4+ T cells promoted immune system
dysfunction
In which of the following infectious diseases have vaccines been least effective?
a. HIV
b. Paralytic Polio
c. Smallpox
d. Mumps - Correct Answer- a. HIV
An example of passive immunity is when Chase transferred immunity to tuberculosis between guinea
pigs via WBC's - Correct Answer- passive immunity
Serum was observed to have which of the following effects during many of the early studies? -
Correct Answer- -neutralize toxins
-transfer immune state to unimmunized animals
-precipitate toxins
-agglutinate toxins
Who first observed the role of immunity in health and disease?
a. Thucydides
b. Snell
c. Hoffman
d. Pasteur - Correct Answer- a. Thucydides
Which of the following are roles of the immune system? - Correct Answer- -Promote mutualistic
microorganism interactions
-distinguish between foreign pathogens
-distinguish between self and foreign invaders
-distinguish between self and altered self
The targets of the influenze vaccine are ______ and ______ - Correct Answer- 1. Hemagglutinin
2. Neuraminidase
Which of the following statements are true regarding the adaptive immune system?
-major cell types would include phagocytes
-increase in magnitude with successive exposure
-constantly activated defense mechanisms
-T cells and B cells are major players
-response in days
, -respond essentially the same way to repeat infections
-respond in hours
-inducible
-tailor-made
-important for further activation of the immune system - Correct Answer- -increase in magnitude
with successive exposure
-T cells and B cells are major players
-response in days
-inducible
-tailor-made
Which of the following statements are true regarding the innate immune system?
-major cell types would include phagocytes
-increase in magnitude with successive exposure
-several constantly activated defense mechanisms
-T cells and B cells are major players
-response in days
-respond essentially the same way to repeat infections
-respond in hours
-inducible
-tailor-made
-important for further activation of the immune system - Correct Answer- -respond essentially the
same way to repeat infections
-respond in hours
-important for further activation of the immune system
-major cell types would include phagocytes
-several constantly activated defense mechanisms
What effect does the release of proinflammatory cytokines such as IL-1, IL-6, and TNF-a have? -
Correct Answer- -Initiate a fever that may negatively impact pathogen stability or ability to replicate
-further activate other cell types such as macrophages
Phagocytic cells have certain receptors that can recognize PAMPs or DAMPs
-True
-False - Correct Answer- -True
If a surface contained both calprotectin and psoriasin which pathogen will ikely be found on that
surface?
a. S. aureus
b. Both S. aureus and E. coli
c. Neither S. aureus and E. coli
d. E. coli - Correct Answer- c. Neither S. aureus nor E. coli
Which of the following statements is false regarding complement?
a. Opsonization, stimulation of inflammatory mediator, and lysis of microbes are some of
complement's functions
b. complement proteins are always active
c. complement activations follows a cascade mechanism
d. complement activation has several pathways that each begin with specific proteins - Correct
Answer- b. complement proteins are always active
