Question 1

Humoral immunity is mediated by:

Accepted Answer

A)   natural killer cells.
B)   T lymphocytes (T cells) .
C)   B lymphocytes (B cells) .
D)   neutrophils.E) A) and C)
F) C) and D)

Question 2

Distinguishing clinical features of systemic lupus erythematosus include:

Accepted Answer

A)   inflammation in multiple organs.
B)   lack of a specific diagnostic blood test.
C)   acute onset and nonprogressive course.
D)   typical skin rash on the chest and back.E) B) and D)
F) All of the above

Question 3

The most common cause of death in patients who have AIDS is:

Accepted Answer

A)   HIV encephalopathy.
B)   tuberculosis.
C)   Pneumocystis carinii pneumonia.
D)   Candida infection.E) B) and C)
F) C) and D)

Question 4

Tissue transferred between two genetically identical twins is referred to as a/an:

Accepted Answer

A)   allograft.
B)   syngraft.
C)   isograft.
D)   autograft.E) A) and B)
F) All of the above

Question 5

Which of the following statements regarding immunoglobulins is TRUE?

Accepted Answer

A)   They consist of a unique sequence of amino acids.
B)   They are produced in the red bone marrow.
C)   They are attached to mucosal membranes at entry points into the body.
D)   IgA binds to allergens.E) B) and C)
F) None of the above

Question 6

Which of the following statements does NOT apply to major histocompatibility complex (MHC)  proteins or molecules?

Accepted Answer

A)   They are genes on chromosome 6.
B)   All members of a family have identical MHCs.
C)   They alert the immune system to virus-infected cells.
D)   A close match is essential for successful tissue transplants.E) All of the above
F) None of the above

Question 7

CD4-positive helper T cells function by:

Accepted Answer

A)   direct cytotoxic action.
B)   facilitating all immune system activity.
C)   producing immunoglobulins.
D)   inactivating allergens.E) A) and B)
F) A) and C)

Question 8

Systemic lupus erythematosus is caused by:

Accepted Answer

A)   a chronic allergic condition.
B)   development of an immune-deficient state.
C)   a deficiency of T lymphocytes.
D)   immune complex deposits of antinuclear antibodies.E) B) and C)
F) A) and B)

Question 9

In cases of HIV infection, the "window period" refers to the time between:

Accepted Answer

A)   entry of the virus into the blood and the initial manifestations.
B)   entry of the virus into the body and the appearance of antibodies in the blood.
C)   entry of the virus into the body and a significant drop in CD4 T-helper lymphocyte count.
D)   diagnosis of "HIV positive" and diagnosis of "AIDS."E) A) and B)
F) A) and D)

Question 10

Host-versus-graft disease refers to:

Accepted Answer

A)   hyperacute rejection of tissue.
B)   T cells in grafted tissue attacking host cells.
C)   infection resulting from immunosuppression therapy.
D)   transplant rejection by the recipient's immune system.E) C) and D)
F) A) and B)

Question 11

The term tolerance refers to:

Accepted Answer

A)   surveillance and destruction of new cancer cells by the immune system.
B)   the ability of the immune system to ignore "self" cells.
C)   the ability of T and B lymphocytes to work together.
D)   the role of lymphoid tissue in the body defenses.E) A) and D)
F) A) and C)

Question 12

Incompatible blood transfusions result in:

Accepted Answer

A)   hemolysis of erythrocytes.
B)   a type I immune response.
C)   deposits in multiple organs.
D)   immune deficiency.E) A) and B)
F) A) and C)

Question 13

Which of the following statements is TRUE regarding a patient who is HIV positive?

Accepted Answer

A)   No medication is required until the CD4 cell count drops below normal range.
B)   Antibodies are present, destroying the virus and preventing transmission to others.
C)   Antibodies in the blood indicate presence of virus and possible transmission to others.
D)   Enzymes have not yet converted RNA to DNA for replication.E) None of the above
F) C) and D)

Question 14

When an allergen binds with IgE antibodies on mast cells, resulting in release of chemical mediators, this reaction is called:

Accepted Answer

A)   cytotoxic hypersensitivity.
B)   immune complex hypersensitivity.
C)   type I hypersensitivity.
D)   type IV hypersensitivity.E) B) and C)
F) A) and D)

Question 15

The role of memory cells is to:

Accepted Answer

A)   change into an antibody-secreting cell following activation.
B)   immediately secrete antibodies following the first exposure to antigen.
C)   recognize the antigen and stimulate the immune response.
D)   bind complement to the antibody.E) A) and B)
F) All of the above

Exam 7: Immunity

Which of the following statements regarding immunoglobulins is TRUE?

Correct Answer
verified

The term tolerance refers to:

Correct Answer
verified

Which of the following statements is TRUE regarding a patient who is HIV positive?

Correct Answer
verified

Distinguishing clinical features of systemic lupus erythematosus include:

Correct Answer
verified

The role of memory cells is to:

Correct Answer
verified

The most common cause of death in patients who have AIDS is:

Correct Answer
verified

Systemic lupus erythematosus is caused by:

Correct Answer
verified

Host-versus-graft disease refers to:

Correct Answer
verified

Incompatible blood transfusions result in:

Correct Answer
verified

Tissue transferred between two genetically identical twins is referred to as a/an:

Correct Answer
verified

When an allergen binds with IgE antibodies on mast cells, resulting in release of chemical mediators, this reaction is called:

Correct Answer
verified

In cases of HIV infection, the "window period" refers to the time between:

Correct Answer
verified

Humoral immunity is mediated by:

Correct Answer
verified

CD4-positive helper T cells function by:

Correct Answer
verified

Which of the following statements does NOT apply to major histocompatibility complex (MHC) proteins or molecules?

Correct Answer
verified

Exam 7: Immunity

Which of the following statements regarding immunoglobulins is TRUE?

Correct AnswerverifiedShow Answer

The term tolerance refers to:

Correct AnswerverifiedShow Answer

Which of the following statements is TRUE regarding a patient who is HIV positive?

Correct AnswerverifiedShow Answer

Distinguishing clinical features of systemic lupus erythematosus include:

Correct AnswerverifiedShow Answer

The role of memory cells is to:

Correct AnswerverifiedShow Answer

The most common cause of death in patients who have AIDS is:

Correct AnswerverifiedShow Answer

Systemic lupus erythematosus is caused by:

Correct AnswerverifiedShow Answer

Host-versus-graft disease refers to:

Correct AnswerverifiedShow Answer

Incompatible blood transfusions result in:

Correct AnswerverifiedShow Answer

Tissue transferred between two genetically identical twins is referred to as a/an:

Correct AnswerverifiedShow Answer

When an allergen binds with IgE antibodies on mast cells, resulting in release of chemical mediators, this reaction is called:

Correct AnswerverifiedShow Answer

In cases of HIV infection, the "window period" refers to the time between:

Correct AnswerverifiedShow Answer

Humoral immunity is mediated by:

Correct AnswerverifiedShow Answer

CD4-positive helper T cells function by:

Correct AnswerverifiedShow Answer

Which of the following statements does NOT apply to major histocompatibility complex (MHC) proteins or molecules?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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