Question 1

Blood and lymph have the following in common EXCEPT

Accepted Answer

A)  nucleated cells.
B)  proteins.
C)  red blood cells.
D)  none of theseE) All of the above
F) None of the above

Question 2

Why are secondary or "booster" reimmunizations given?

Accepted Answer

A)  Secondary immunizations are necessary for an innate immune response.
B)  Secondary reimmunizations produce a secondary immune response and boost antibody titers.
C)  Secondary reimmunizations produce a phagocytic immune response that is longer lasting than the primary immune response.
D)  Frequent secondary reimmunizations are needed because the immune system doesn't remember antigens for more than a few years.E) A) and B)
F) A) and C)

Question 3

The inflammatory cytokines IL-1,IL-6,and TNF-α are also

Accepted Answer

A)  opsonizing agents that coat foreign cells.
B)  activating cytokines that stimulate Th1 cells to replicate.
C)  capable of producing systemic fever by stimulating the release of prostaglandins in the brain.
D)  part of the complement system that results in the destruction of foreign cells.E) A) and C)
F) B) and D)

Question 4

All gram-negative bacteria have lipopolysaccharides in their outer membranes.

Accepted Answer

A) True 
 B)False

Question 5

Monocytes and granulocytes are the two lineages of myeloid cells.

Accepted Answer

A) True 
 B)False

Question 6

Vaccines can be developed from synthetic peptides.

Accepted Answer

A) True 
 B)False

Question 7

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

Accepted Answer

A)  chemically inactivated bacteria
B)  dead virus
C)  live virus
D)  toxoidE) B) and C)
F) C) and D)

Question 8

The rapid increase in adaptive immunity after a second antigen exposure is called

Accepted Answer

A)  immune memory.
B)  specificity.
C)  tolerance.
D)  immune memory,specificity,or tolerance.E) A) and B)
F) None of the above

Question 9

TH2 cells interact directly with the pathogens.

Accepted Answer

A) True 
 B)False

Question 10

Systemic lupus erythematosus (SLE) is an example of a disease caused by type ________ hypersensitivity.

Accepted Answer

A)  I
B)  II
C)  III
D)  IVE) None of the above
F) A) and D)

Question 11

Symptoms of delayed-type hypersensitivity may appear several hours to days after secondary exposure to the eliciting antigen.

Accepted Answer

A) True 
 B)False

Question 12

Superantigens produce a harmful immune response because

Accepted Answer

A)  they activate too many T cells,causing excessive inflammation and cell damage.
B)  they initiate a type I allergic response resulting in excessive inflammation.
C)  too many phagocytes are activated and destroy host tissue.
D)  a strong immune response is necessary to protect the host from the pathogen.E) None of the above
F) C) and D)

Question 13

In adaptive immunity,pathogen specific receptors are produced in large numbers only after exposure to the pathogen or its products.

Accepted Answer

A) True 
 B)False

Question 14

The body's non-inducible,preexisting ability to recognize and destroy pathogens or their products is called

Accepted Answer

A)  adaptive immunity.
B)  innate immunity.
C)  phagocytosis.
D)  cytotoxic response.E) All of the above
F) A) and D)

Question 15

The purposeful artificial stimulation of active immunity to a particular infectious disease is known as

Accepted Answer

A)  immunodeficiency.
B)  hypersensitivity.
C)  immunization.
D)  opsonization.E) A) and B)
F) None of the above

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

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.E) B) and D)
F) All of the above

Question 18

Individuals with severe combined immunodeficiency syndrome (SCID)have a genetic defect that prevents proper formation and expression of immunoglobins and T cells and therefore do not have adaptive immunity.

Accepted Answer

A) True 
 B)False

Question 19

What are the primary chemical mediators released from mast cells during a type I hypersensitivity reaction?

Accepted Answer

A)  antibodies
B)  interleukin I and tumor necrosis factor
C)  histamine and serotonin
D)  cytokinesE) B) and D)
F) A) and C)

Question 20

A recombinant-vector virus would still be effective if the vaccinia virus is unable to express the cloned gene as an antigenic protein.

Accepted Answer

A) True 
 B)False

Exam 24: Immunity and Host Defense

The secondary lymphoid organs consist of the following EXCEPT

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The rapid increase in adaptive immunity after a second antigen exposure is called

Correct AnswerverifiedShow Answer

All gram-negative bacteria have lipopolysaccharides in their outer membranes.

Correct AnswerverifiedShow Answer

Superantigens produce a harmful immune response because

Correct AnswerverifiedShow Answer

Systemic lupus erythematosus (SLE) is an example of a disease caused by type ________ hypersensitivity.

Correct AnswerverifiedShow Answer

Blood and lymph have the following in common EXCEPT

Correct AnswerverifiedShow Answer

In adaptive immunity,pathogen specific receptors are produced in large numbers only after exposure to the pathogen or its products.

Correct AnswerverifiedShow Answer

The purposeful artificial stimulation of active immunity to a particular infectious disease is known as

Correct AnswerverifiedShow Answer

Symptoms of delayed-type hypersensitivity may appear several hours to days after secondary exposure to the eliciting antigen.

Correct AnswerverifiedShow Answer

Why are secondary or "booster" reimmunizations given?

Correct AnswerverifiedShow Answer

Individuals with severe combined immunodeficiency syndrome (SCID)have a genetic defect that prevents proper formation and expression of immunoglobins and T cells and therefore do not have adaptive immunity.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The body's non-inducible,preexisting ability to recognize and destroy pathogens or their products is called

Correct AnswerverifiedShow Answer

What are the primary chemical mediators released from mast cells during a type I hypersensitivity reaction?

Correct AnswerverifiedShow Answer

A recombinant-vector virus would still be effective if the vaccinia virus is unable to express the cloned gene as an antigenic protein.

Correct AnswerverifiedShow Answer

The inflammatory cytokines IL-1,IL-6,and TNF-α are also

Correct AnswerverifiedShow Answer

Monocytes and granulocytes are the two lineages of myeloid cells.

Correct AnswerverifiedShow Answer

TH2 cells interact directly with the pathogens.

Correct AnswerverifiedShow Answer

Vaccines can be developed from synthetic peptides.

Correct AnswerverifiedShow Answer

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