Question 1

Helper T cells can stimulate the proliferation of cytotoxic T cells but not that of B cells.

Accepted Answer

A) True 
 B)False

Question 2

In the presence of activated complement, neutrophils

Accepted Answer

A)   are repelled
B)   produce histamine
C)   cause vasodilation
D)   degranulate and release enzymes that cause tissue damageE) All of the above
F) B) and C) D

Question 3

Arrange the following events in the proper order in which they occur during an allergic response. 1 = Individual experiences symptoms
2 = Individual is sensitized to antigen
3 = IgE attaches to mast cells
4 = Antigen binds to IgE

Accepted Answer

A)   1, 2, 3, 4
B)   1, 3, 4, 2
C)   2, 3, 1, 4
D)   2, 3, 4, 1
E)   2, 4, 3, 1F) A) and B)
G) D) and E)

Question 4

Immune complexes consist of

Accepted Answer

A)   antibody plus complement
B)   basophil plus complement
C)   antigen plus antibody
D)   antigen plus complementE) A) and B)
F) A) and C)

Question 5

T cells are divided into two primary groups, effector and regulatory. Which of the following are regulatory T cells?

Accepted Answer

A)   helper T cells
B)   cytotoxic T cells
C)   chemotaxic T cells
D)   delayed hypersensitivity T cells
E)   assistant T cellsF) C) and D)
G) A) and B) A

Question 6

People with type O blood can be universal donors because their red blood cells do not contain either A antigen or B antigen on their surface.

Accepted Answer

A)   True
B)   FalseC) A) and B)
D) undefined

Question 7

What is the cell that is responsible for a secondary antibody response to an antigen?

Accepted Answer

A)   Memory B cell
B)   Plasma cell
C)   Cytotoxic T cell
D)   All of the above are responsibleE) B) and C)
F) A) and D)

Question 8

With advancing age, the lymphatic system

Accepted Answer

A)   Becomes less efficient at absorbing dietary lipids
B)   Ceases to transport lymph
C)   Produces an increasing number and variety of B-lymphocytes
D)   Is less responsive to antigens
E)   All choices are correctF) B) and E)
G) C) and E)

Question 9

Most intermediate size antigen antibody complexes are removed by phagocytosis.

Accepted Answer

A)   True
B)   FalseC) A) and B)
D) undefined

Question 10

For a hypersensitivity response to occur, two bound IgE molecules on a mast cell must react with a specific antigen.

Accepted Answer

A)   True
B)   FalseC) A) and B)
D) undefined

Question 11

An individual antibody is made against

Accepted Answer

A)   a whole bacterial cell
B)   one epitope on the cell
C)   one antigen on the cell
D)   all of the combined antigenic determinants on a cell
E)   the cell's DNAF) B) and D)
G) D) and E)

Question 12

Cytotoxic T cells produce

Accepted Answer

A)   class II MHCs
B)   self proteins
C)   antibodies, which make holes in cell membrane of infected cells
D)   perforin, which makes holes in cell membrane of infected cellsE) None of the above
F) A) and B) D

Question 13

Many different antibodies can be made against a single antigen.

Accepted Answer

A)   True
B)   FalseC) A) and B)
D) undefined

Question 14

A hypersensitivity reaction occurs

Accepted Answer

A)   during the first exposure to an antigen.
B)   during a second or subsequent exposure to an antigen.
C)   in individuals with diseases of the immune system.
D)   only in children.
E)   only in individuals with asthma.F) C) and D)
G) C) and E)

Question 15

Tonsils

Accepted Answer

A)   increase in size in adults.
B)   are located in both the oral and abdominal cavities.
C)   provide protection against bacteria entering the oral and nasal cavities.
D)   contain red pulp and white pulp.
E)   are not functional in children.F) A) and B)
G) B) and C)

Question 16

An antigen presenting cell presents antigen to a T helper cell

Accepted Answer

A)   inside a vesicle
B)   on its surface on a class I MHC
C)   on its surface on a class II MHC
D)   on its surface attached to an antibodyE) None of the above
F) A) and B)

Question 17

Which of the following is the molecule that displays an antigen on the surface of cells?

Accepted Answer

A)   Antigenic determinant
B)   Antibody
C)   Antigen receptor
D)   Major histocompatibility complex moleculeE) None of the above
F) All of the above

Question 18

Histamine released by mast cells leads to all of the following symptoms except

Accepted Answer

A)   capillary dilation
B)   airway constriction
C)   high fever
D)   mucus secretion
E)   itchingF) A) and D)
G) C) and E)

Question 19

Skin lesions due to hypersensitivity appear

Accepted Answer

A)   24 hours after first exposure to antigen
B)   48-72 hours after first exposure to antigen
C)   24 hours after second exposure to antigen
D)   3 weeks after second exposure to antigenE) None of the above
F) C) and D)

Question 20

Helper T cells interact with target cells by recognizing

Accepted Answer

A)   antigens only.
B)   MHC proteins only.
C)   antigen-MHC protein complexes.
D)   either antigens or MHC proteins.
E)   neither antigens nor MHC proteins.F) C) and D)
G) A) and E)

Exam 14: The Lymphatic System and Immunity

Helper T cells can stimulate the proliferation of cytotoxic T cells but not that of B cells.

Correct AnswerverifiedShow Answer

In the presence of activated complement, neutrophils

Correct AnswerverifiedD

Arrange the following events in the proper order in which they occur during an allergic response. 1 = Individual experiences symptoms 2 = Individual is sensitized to antigen 3 = IgE attaches to mast cells 4 = Antigen binds to IgE

Correct AnswerverifiedShow Answer

Immune complexes consist of

Correct AnswerverifiedShow Answer

T cells are divided into two primary groups, effector and regulatory. Which of the following are regulatory T cells?

Correct AnswerverifiedA

People with type O blood can be universal donors because their red blood cells do not contain either A antigen or B antigen on their surface.

Correct AnswerverifiedShow Answer

What is the cell that is responsible for a secondary antibody response to an antigen?

Correct AnswerverifiedShow Answer

With advancing age, the lymphatic system

Correct AnswerverifiedShow Answer

Most intermediate size antigen antibody complexes are removed by phagocytosis.

Correct AnswerverifiedShow Answer

For a hypersensitivity response to occur, two bound IgE molecules on a mast cell must react with a specific antigen.

Correct AnswerverifiedShow Answer

An individual antibody is made against

Correct AnswerverifiedShow Answer

Cytotoxic T cells produce

Correct AnswerverifiedD

Many different antibodies can be made against a single antigen.

Correct AnswerverifiedShow Answer

A hypersensitivity reaction occurs

Correct AnswerverifiedShow Answer

Tonsils

Correct AnswerverifiedShow Answer

An antigen presenting cell presents antigen to a T helper cell

Correct AnswerverifiedShow Answer

Which of the following is the molecule that displays an antigen on the surface of cells?

Correct AnswerverifiedShow Answer

Histamine released by mast cells leads to all of the following symptoms except

Correct AnswerverifiedShow Answer

Skin lesions due to hypersensitivity appear

Correct AnswerverifiedShow Answer

Helper T cells interact with target cells by recognizing

Correct AnswerverifiedShow Answer

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D

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