Question 1

The secondary lymphoid organs consist of the following EXCEPT

Accepted Answer

A)  lymph nodes. 
B)  mucosal-associated lymphoid tissue (MALT). 
C)  spleen. 
D)  All of these organs are secondary lymphoid organs. 
A)  lymph nodes. 
B)  mucosal-associated lymphoid tissue (MALT). 
C)  spleen. 
D)  All of these organs are secondary lymphoid organs.

Question 2

An attenuated strain of a pathogen

Accepted Answer

A)  has lost its virulence, but may be used to create a vaccine. 
B)  has changed its antigens to avoid an adaptive immune response. 
C)  is more virulent than the regular strains and may cause septic shock. 
D)  is an extracellular pathogen that will be cleared by innate immunity. 
A)  has lost its virulence, but may be used to create a vaccine. 
B)  has changed its antigens to avoid an adaptive immune response. 
C)  is more virulent than the regular strains and may cause septic shock. 
D)  is an extracellular pathogen that will be cleared by innate immunity.

Question 3

An antigen must be at least ________ amino acids long to be effective in a vaccine.

Accepted Answer

A)  10 
B)  25 
C)  50 
D)  100 
A)  10 
B)  25 
C)  50 
D)  100

Question 4

How do phagocytes interact speedily and effectively with pathogens?

Accepted Answer

Phagocytes have evolved specialized mole

Question 5

The essential protective role for T cell immunity is protection from

Accepted Answer

A)  viruses. 
B)  extracellular pathogens. 
C)  bacteria. 
D)  intracellular pathogens. 
A)  viruses. 
B)  extracellular pathogens. 
C)  bacteria. 
D)  intracellular pathogens.

Question 6

Which of the following diseases is/are associated with organ-specific autoimmune disease?

Accepted Answer

A)  autoimmune hypothyroidism 
B)  juvenile (type I) diabetes 
C)  systemic lupus erythematosus (SL
E)  
D)  autoimmune hypothyroidism and juvenile (type I) diabetes 
A)  autoimmune hypothyroidism 
B)  juvenile (type I) diabetes 
C)  systemic lupus erythematosus (SL
E)  
D)  autoimmune hypothyroidism and juvenile (type I) diabetes

Question 7

Which of the following cell types has NO nucleus?

Accepted Answer

A)  erythrocytes 
B)  lymphocytes 
C)  phagocyte 
D)  All of these cells lack a nucleus. 
A)  erythrocytes 
B)  lymphocytes 
C)  phagocyte 
D)  All of these cells lack a nucleus.

Question 8

Enhanced phagocytosis of antibody-sensitized cells is known as

Accepted Answer

A)  complementation. 
B)  immunization. 
C)  opsonization. 
D)  tolerance. 
A)  complementation. 
B)  immunization. 
C)  opsonization. 
D)  tolerance.

Question 9

How does the body respond when it first encounters a foreign particle or bacterial pathogen?

Accepted Answer

The body has defensive cells called phag

Question 10

New vaccine strategies resulting from progress in biochemistry and molecular biology include the production of

Accepted Answer

A)  DNA vaccines. 
B)  recombinant vector vaccines. 
C)  synthetic peptide vaccines. 
D)  DNA, recombinant vector, and synthetic peptide vaccines. 
A)  DNA vaccines. 
B)  recombinant vector vaccines. 
C)  synthetic peptide vaccines. 
D)  DNA, recombinant vector, and synthetic peptide vaccines.

Question 11

Blood serum contains cells and clotting proteins.

Accepted Answer

A) True 
 B)False

Question 12

Dendritic cells are phagocytes with antigen-presenting properties.

Accepted Answer

A) True 
 B)False

Question 13

Why do individuals with genetic defects that prevent neutrophil or macrophage development usually die at an early age? Be specific and detailed in your answer to demonstrate your knowledge on the role of these cells in the immune system.

Accepted Answer

Individuals with such defects cannot liv

Question 14

What is tolerance,and why must the adaptive immune system exhibit tolerance?

Accepted Answer

Tolerance is the acquired inability to m

Question 15

You are bitten by a venomous snake at a nature center.A snake handler is also bitten.You are rushed to the emergency room and given an antiserum.The snake handler does not receive treatment because he said he was exposed to venom so many times that he is immune.What is antiserum and will you have long-lasting immunity to snake venom after this? Is what the snake handler said possible or should he also receive treatment? If he does not receive treatment and is not affected,what is protecting him?

Accepted Answer

Antiserum is a type of artificial passiv

Question 16

Which of the following immunogens is MOST effective as a vaccine?

Accepted Answer

A)  chemically inactivated bacteria 
B)  dead virus 
C)  live virus 
D)  toxoid 
A)  chemically inactivated bacteria 
B)  dead virus 
C)  live virus 
D)  toxoid

Question 17

Staphylococcus aureus and Streptococcus pyogenes produce exotoxins known as superantigens that bind to a site on the TCR that is outside the antigen-specific TCR binding site.

Accepted Answer

A) True 
 B)False

Question 18

Adaptive immunity occurs when

Accepted Answer

A)  death results from pathogen infection. 
B)  the innate immune response fails to eliminate pathogens in the body. 
C)  virulent pathogen infections persist in the body after the initial innate defense response. 
D)  the innate immune response fails to eliminate pathogens in the body and virulent infections persist after the initial innate defense response. 
A)  death results from pathogen infection. 
B)  the innate immune response fails to eliminate pathogens in the body. 
C)  virulent pathogen infections persist in the body after the initial innate defense response. 
D)  the innate immune response fails to eliminate pathogens in the body and virulent infections persist after the initial innate defense response.

Question 19

What is antigen presentation? Why is antigen presentation important for long-term immunity?

Accepted Answer

Antigen presentation is the transportati

Question 20

Immunity results from the actions of cells that circulate throughout the body,primarily through the blood and lymph.

Accepted Answer

A) True 
 B)False

Exam 24: Immunity and Host Defense

The secondary lymphoid organs consist of the following EXCEPT

An attenuated strain of a pathogen

An antigen must be at least ________ amino acids long to be effective in a vaccine.

How do phagocytes interact speedily and effectively with pathogens?

The essential protective role for T cell immunity is protection from

Which of the following diseases is/are associated with organ-specific autoimmune disease?

Which of the following cell types has NO nucleus?

Enhanced phagocytosis of antibody-sensitized cells is known as

How does the body respond when it first encounters a foreign particle or bacterial pathogen?

New vaccine strategies resulting from progress in biochemistry and molecular biology include the production of

Blood serum contains cells and clotting proteins.

Dendritic cells are phagocytes with antigen-presenting properties.

Why do individuals with genetic defects that prevent neutrophil or macrophage development usually die at an early age? Be specific and detailed in your answer to demonstrate your knowledge on the role of these cells in the immune system.

What is tolerance,and why must the adaptive immune system exhibit tolerance?

Which of the following immunogens is MOST effective as a vaccine?

Staphylococcus aureus and Streptococcus pyogenes produce exotoxins known as superantigens that bind to a site on the TCR that is outside the antigen-specific TCR binding site.

Adaptive immunity occurs when

What is antigen presentation? Why is antigen presentation important for long-term immunity?

Immunity results from the actions of cells that circulate throughout the body,primarily through the blood and lymph.

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