Question 1

The inflammatory response includes a decrease in the permeability of capillaries to prevent excessive blood loss after injury.

Accepted Answer

A) True 
 B)False

Question 2

Which is not an action of interferon

Accepted Answer

A)  It stimulates macrophages and NK cells to destroy virus-infected cells.
B)  It triggers synthesis of enzymes that destroy viral nucleic acids.
C)  It signals the immune system that the secreting cell is part of the body and so should not be attacked.
D)  It binds to receptors of neighboring cells preventing them from being infected.E) B) and C)
F) A) and D)

Question 3

MHC class I molecules on a cell allow it to interact with

Accepted Answer

A)  natural killer cells.
B)  cytotoxic T-lymphocytes.
C)  helper T-lymphocytes.
D)  CD8+B-lymphocytes.E) B) and D)
F) A) and B)

Question 4

The second signal during cytotoxic T-lymphocyte activation involves stimulation of the cell by interleukin 2 released by helper T-lymphocytes.

Accepted Answer

A) True 
 B)False

Question 5

Which type of antibody is formed in response to parasitic infections and allergies,and has the effect of activating mast cells and basophils

Accepted Answer

A)  IgA
B)  IgB
C)  IgD
D)  IgE
E)  IgGF) A) and E)
G) A) and C)

Question 6

Exudate formation delivers substances to eliminate injurious agents,and the resulting increase in interstitial hydrostatic pressure leads to increased fluid uptake by lymphatic capillaries.

Accepted Answer

A) True 
 B)False

Question 7

Some antibodies cross the placenta.

Accepted Answer

A) True 
 B)False

Question 8

Nonspecific immunity is another name for

Accepted Answer

A)  adaptive immunity.
B)  innate immunity.
C)  cell-mediated immunity.
D)  acquired immunity.E) C) and D)
F) A) and C)

Question 9

A secondary response to an infectious agent has a _______ latent phase than a primary response has.

Accepted Answer

A)  longer
B)  shorterC) A) and B)
D) undefined

Question 10

Why are functions of T-lymphocytes referred to as "cell-mediated" immunity

Accepted Answer

A)  Because T-lymphocytes are cells and not just plasma proteins
B)  Because T-lymphocytes work against antigens associated with cells
C)  Because T-lymphocytes work only against single-celled infectious agents
D)  Because T-lymphocytes must activate other classes of cells in order to have any effectE) A) and B)
F) A) and C) B

Question 11

Inflamed tissue feels warm due to

Accepted Answer

A)  increased blood flow and increased metabolic activity.
B)  the margination of white blood cells.
C)  chemotaxis and defervescence.
D)  activation of complement by binding of C-reactive protein to bacterial carbohydrates.E) C) and D)
F) None of the above

Question 12

Active immunity requires

Accepted Answer

A)  the transfer of antibodies from another individual.
B)  direct encounter with the antigen.
C)  that an active virus be used in a vaccine.
D)  that all immune responses to the pathogen result in symptoms of illness.E) A) and B)
F) A) and C)

Question 13

When part of the immune system recognizes and binds to a foreign molecule,the part of the molecule to which binding occurs is called the epitope or _________ determinant.

Accepted Answer

The answer of When part of the immune system recognizes...

Question 14

Which part of an antibody attaches to an antigen

Accepted Answer

A)  The hinge region
B)  The constant region
C)  The heavy chain
D)  The variable regionE) A) and B)
F) A) and D) D

Question 15

The most prevalent antibody in blood and lymph is

Accepted Answer

A)  IgA.
B)  IgC.
C)  IgD.
D)  IgE.
E)  IgG.F) A) and E)
G) D) and E)

Question 16

Activation of lymphocytes occurs in

Accepted Answer

A)  primary lymphatic structures.
B)  secondary lymphatic structures.
C)  tertiary lymphatic structures.
D)  effectors such as muscles and glands.E) None of the above
F) All of the above

Question 17

In positive selection of T-lymphocytes,those cells that

Accepted Answer

A)  bind self antigens are eliminated.
B)  can bind MHC survive.
C)  bind to self antigens survive.
D)  bind to MHC class II are eliminated.E) B) and C)
F) C) and D)

Question 18

What are considered the effectors of humoral immunity

Accepted Answer

A)  Helper T-lymphocytes
B)  Cytotoxic T-lymphocytes
C)  Antibodies
D)  Macrophages
E)  Natural killer cellsF) A) and B)
G) B) and D) C

Question 19

Helper T-lymphocyte activation involves MHC class I,whereas cytotoxic T-lymphocyte activation involves MHC class II.

Accepted Answer

A) True 
 B)False

Question 20

Cytotoxic T-lymphocytes that have killed a foreign cell may transform into

Accepted Answer

A)  memory B-lymphocytes.
B)  natural killer cells.
C)  plasma cells.
D)  helper T-lymphocytes.
E)  None of the choices is correct.F) B) and C)
G) D) and E)

Exam 22: Immune System and the Bodys Defense

The inflammatory response includes a decrease in the permeability of capillaries to prevent excessive blood loss after injury.

Correct AnswerverifiedShow Answer

Which is not an action of interferon

Correct AnswerverifiedShow Answer

MHC class I molecules on a cell allow it to interact with

Correct AnswerverifiedShow Answer

The second signal during cytotoxic T-lymphocyte activation involves stimulation of the cell by interleukin 2 released by helper T-lymphocytes.

Correct AnswerverifiedShow Answer

Which type of antibody is formed in response to parasitic infections and allergies,and has the effect of activating mast cells and basophils

Correct AnswerverifiedShow Answer

Exudate formation delivers substances to eliminate injurious agents,and the resulting increase in interstitial hydrostatic pressure leads to increased fluid uptake by lymphatic capillaries.

Correct AnswerverifiedShow Answer

Some antibodies cross the placenta.

Correct AnswerverifiedShow Answer

Nonspecific immunity is another name for

Correct AnswerverifiedShow Answer

A secondary response to an infectious agent has a _______ latent phase than a primary response has.

Correct AnswerverifiedShow Answer

Why are functions of T-lymphocytes referred to as "cell-mediated" immunity

Correct AnswerverifiedB

Inflamed tissue feels warm due to

Correct AnswerverifiedShow Answer

Active immunity requires

Correct AnswerverifiedShow Answer

When part of the immune system recognizes and binds to a foreign molecule,the part of the molecule to which binding occurs is called the epitope or _________ determinant.

Correct AnswerverifiedShow Answer

Which part of an antibody attaches to an antigen

Correct AnswerverifiedD

The most prevalent antibody in blood and lymph is

Correct AnswerverifiedShow Answer

Activation of lymphocytes occurs in

Correct AnswerverifiedShow Answer

In positive selection of T-lymphocytes,those cells that

Correct AnswerverifiedShow Answer

What are considered the effectors of humoral immunity

Correct AnswerverifiedC

Helper T-lymphocyte activation involves MHC class I,whereas cytotoxic T-lymphocyte activation involves MHC class II.

Correct AnswerverifiedShow Answer

Cytotoxic T-lymphocytes that have killed a foreign cell may transform into

Correct AnswerverifiedShow Answer

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B

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D

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C

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