Immunity

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Question 1
Free
Multiple Choice

Neutrophils:

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A

are phagocytic cells.

B

produce histamine.

C

produce antibodies.

D

are elevated during an allergic response.

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Question 2
Free
Multiple Choice

Which cells are required to process and present antigens from foreign material as the initial step in the immune response?

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A

T-helper cells

B

Macrophages

C

Eosinophils

D

Monocytes

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Question 3
Free
Multiple Choice

Humoral immunity is mediated by:

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A

natural killer cells.

B

T lymphocytes (T cells).

C

B lymphocytes (B cells).

D

neutrophils.

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Question 4
Free
Multiple Choice

A secondary immune response differs from the primary immune response in that:

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A

it is more rapid than the primary response and results in higher antibody levels.

B

it is slower than the primary response and doesn't change the antibody levels.

C

it occurs at the same time as the primary response but results in a decrease in antibodies.

D

it only occurs in hyperallergic reactions and results in a decrease of antibodies.

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Question 5
Free
Multiple Choice

Which type of immunity is provided by a vaccination?

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A

Active natural

B

Active artificial

C

Passive natural

D

Passive artificial

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Question 6
Multiple Choice

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

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A
cytotoxic hypersensitivity.
B
immune complex hypersensitivity.
C
type I hypersensitivity.
D
type IV hypersensitivity.
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Question 7
Multiple Choice

The role of memory cells is to:

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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.
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Question 8
Multiple Choice

Which statement applies to contact dermatitis?

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A
It occurs when IgE antibodies on the skin react with the causative substance.
B
It may result from ingested foods.
C
Urticaria (hives) gradually spread over the body.
D
A type IV reaction occurs in affected areas.
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Question 9
Multiple Choice

Which of the following causes anaphylaxis?

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A
A severe, systemic allergic reaction
B
Type III hypersensitivity
C
Cell-mediated hypersensitivity
D
Immune complex deposits in many tissues
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Question 10
Multiple Choice

Following a positive HIV antibodies blood test and ELISA test, what is the test commonly used for confirmation?

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A
Agglutination
B
Double immunodiffusion test
C
Western blot test
D
Sedimentation rate test
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Question 11
Multiple Choice

Incompatible blood transfusions result in:

Choose correct answer/s
A
hemolysis of erythrocytes.
B
a type I immune response.
C
deposits in multiple organs.
D
immune deficiency.
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Question 12
Multiple Choice

An autoimmune disease is:

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A
excessive formation of antibodies following exposure to foreign material.
B
an extreme response to normally harmless material in the environment.
C
an abnormal response to ingested food and drugs.
D
failure of the immune system to distinguish self from nonself.
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Question 13
Multiple Choice

Systemic lupus erythematosus is caused by:

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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.
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Question 14
Multiple Choice

Distinguishing clinical features of systemic lupus erythematosus include:

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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.
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Question 15
Multiple Choice

Which of the following are the target cells for HIV?

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A
Helper T lymphocytes (CD4 lymphocytes)
B
B lymphocytes
C
Natural killer cells
D
Macrophages
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Question 16
Multiple Choice

A diagnosis of HIV positive means that:

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A
the number of T lymphocytes in the circulating blood is decreased.
B
significant opportunistic infection is present in the body.
C
the individual has AIDS.
D
the virus and its antibodies are present in the blood.
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Question 17
Multiple Choice

HIV infection impairs:

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A
humoral immunity.
B
cell-mediated immunity.
C
both humoral and cell-mediated immunity.
D
neither type of immunity.
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Question 18
Multiple Choice

Immunodeficiencies may result in an increased risk of infections by normally harmless microorganisms. These infections are referred to as:

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A
opportunistic.
B
prophylactic.
C
abnormal.
D
transient.
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Question 19
Multiple Choice

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

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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.
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Question 20
Multiple Choice

CD4-positive helper T cells function by:

Choose correct answer/s
A
direct cytotoxic action.
B
facilitating all immune system activity.
C
producing immunoglobulins.
D
inactivating allergens.
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