Question 1

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 cells 
A) Helper T-lymphocytes 
B) Cytotoxic T-lymphocytes 
C) Antibodies 
D) Macrophages 
E) Natural killer cells C

Question 2

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 effect 
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 effect B

Question 3

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

Question 4

Some antibodies cross the placenta.

Accepted Answer

A) True 
 B)False

Question 5

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. 
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.

Question 6

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. 
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.

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

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

Question 9

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. 
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.

Question 10

Nonspecific immunity is another name for

Accepted Answer

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

Question 11

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

Question 12

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 13

The most prevalent antibody in blood and lymph is

Accepted Answer

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

Question 14

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 15

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 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. 
A) primary lymphatic structures. 
B) secondary lymphatic structures. 
C) tertiary lymphatic structures. 
D) effectors such as muscles and glands.

Question 17

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) IgG 
A) IgA 
B) IgB 
C) IgD 
D) IgE 
E) IgG

Question 18

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 19

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. 
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.

Question 20

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

Accepted Answer

A) longer 
B) shorter 
A) longer 
B) shorter

Exam 22: Immune System and the Bodys Defense

What are considered the effectors of humoral immunity

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

Which part of an antibody attaches to an antigen

Some antibodies cross the placenta.

In positive selection of T-lymphocytes,those cells that

Inflamed tissue feels warm due to

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

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

Which is not an action of interferon

Nonspecific immunity is another name for

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

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.

The most prevalent antibody in blood and lymph is

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

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

Activation of lymphocytes occurs in

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

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

Active immunity requires

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

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