Question 1

Figure 17.2
  
-In Figure 17.2,which areas represent antigen-binding sites?

Accepted Answer

A) a and b 
B) a and c 
C) b and c 
D) c and d 
E) b and d 
A) a and b 
B) a and c 
C) b and c 
D) c and d 
E) b and d

Question 2

At a minimum,the human immune system is capable of recognizing approximately how many different antigens?

Accepted Answer

A) 10⁵ 
B) 10¹⁰ 
C) 10¹⁵ 
D) 10²⁰ 
E) 10²⁵ 
A) 10⁵ 
B) 10¹⁰ 
C) 10¹⁵ 
D) 10²⁰ 
E) 10²⁵

Question 3

An antibody's Fc region can be bound by

Accepted Answer

A) antibodies. 
B) macrophages. 
C) T helper cells. 
D) B cells. 
E) CTLs. 
A) antibodies. 
B) macrophages. 
C) T helper cells. 
D) B cells. 
E) CTLs.

Question 4

Which of the following statements is NOT a possible outcome of antigen-antibody reaction?

Accepted Answer

A) clonal deletion 
B) activation of complement 
C) opsonization 
D) ADCC 
E) agglutination 
A) clonal deletion 
B) activation of complement 
C) opsonization 
D) ADCC 
E) agglutination

Question 5

Which of the following statements is FALSE?

Accepted Answer

A) The variable region of a heavy chain is partially responsible for binding with antigen. 
B) The variable region of a light chain is partially responsible for binding with antigen. 
C) The Fc region may attach to a host cell. 
D) The constant region of a heavy chain is the same for all antibodies. 
E) All of the answers are correct. 
A) The variable region of a heavy chain is partially responsible for binding with antigen. 
B) The variable region of a light chain is partially responsible for binding with antigen. 
C) The Fc region may attach to a host cell. 
D) The constant region of a heavy chain is the same for all antibodies. 
E) All of the answers are correct.

Question 6

The specificity of an antibody is due to

Accepted Answer

A) its valence. 
B) the H chains. 
C) the L chains. 
D) the constant portions of the H and L chains. 
E) the variable portions of the H and L chains. 
A) its valence. 
B) the H chains. 
C) the L chains. 
D) the constant portions of the H and L chains. 
E) the variable portions of the H and L chains.

Question 7

Figure 17.1
  
-In Figure 17.1,which letter on the graph indicates the highest antibody titer during the patient's response to a second and distinct/different antigen?

Accepted Answer

A) a 
B) b 
C) c 
D) d 
E) e 
A) a 
B) b 
C) c 
D) d 
E) e

Question 8

The following events elicit an antibody response.What is the third step?

Accepted Answer

A) Antigen-digest goes to surface of APC. 
B) APC phagocytizes antigen. 
C) B cell is activated. 
D) TH cell recognizes antigen-digest and MHC II. 
E) TH cell produces cytokines. 
A) Antigen-digest goes to surface of APC. 
B) APC phagocytizes antigen. 
C) B cell is activated. 
D) TH cell recognizes antigen-digest and MHC II. 
E) TH cell produces cytokines.

Question 9

In addition to IgG,the antibodies that can fix complement are

Accepted Answer

A) IgM. 
B) IgA. 
C) IgD. 
D) IgE. 
E) None of the answers is correct. 
A) IgM. 
B) IgA. 
C) IgD. 
D) IgE. 
E) None of the answers is correct.

Question 10

The variable region of the antibody is solely responsible for the response to the significant diversity of antigen targets.

Accepted Answer

A) True 
 B)False

Question 11

Newborns' immunity due to the transfer of antibodies across the placenta is an example of

Accepted Answer

A) innate immunity. 
B) naturally acquired active immunity. 
C) naturally acquired passive immunity. 
D) artificially acquired active immunity. 
E) artificially acquired passive immunity. 
A) innate immunity. 
B) naturally acquired active immunity. 
C) naturally acquired passive immunity. 
D) artificially acquired active immunity. 
E) artificially acquired passive immunity.

Question 12

Which of the following statements about natural killer cells is FALSE?

Accepted Answer

A) They destroy virus-infected cells. 
B) They destroy tumor cells. 
C) They destroy cells lacking MHC I. 
D) They are stimulated by an antigen. 
E) None of the answers are correct;all of these statements are true. 
A) They destroy virus-infected cells. 
B) They destroy tumor cells. 
C) They destroy cells lacking MHC I. 
D) They are stimulated by an antigen. 
E) None of the answers are correct;all of these statements are true.

Question 13

The following events occur in cellular immunity,leading to a response from TH cells.What is the third step?

Accepted Answer

A) Antibodies are produced. 
B) Dendritic cell takes up antigen. 
C) Antigen enters M cell. 
D) TH cell produces cytokines. 
E) TH cells proliferate. 
A) Antibodies are produced. 
B) Dendritic cell takes up antigen. 
C) Antigen enters M cell. 
D) TH cell produces cytokines. 
E) TH cells proliferate.

Question 14

Cytokines are protein-based chemical messengers that allow for communication between cells of the immune system.

Accepted Answer

A) True 
 B)False

Question 15

A Tᵣₑg cell deficiency could result in

Accepted Answer

A) increased number of viral infections. 
B) increased number of bacterial infections. 
C) autoimmunity. 
D) increased severity of bacterial infections. 
E) transplant rejection. 
A) increased number of viral infections. 
B) increased number of bacterial infections. 
C) autoimmunity. 
D) increased severity of bacterial infections. 
E) transplant rejection.

Question 16

Only dendritic cells produce interleukins.

Accepted Answer

A) True 
 B)False

Question 17

The most abundant class of antibodies in serum is

Accepted Answer

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

Question 18

A cell undergoing apoptosis

Accepted Answer

A) bursts and releases intracellular contents. 
B) was necessarily bound by antibodies. 
C) is employed as an infection-fighting mechanism. 
D) is a malfunction of the immune system. 
E) will likely damage nearby cells. 
A) bursts and releases intracellular contents. 
B) was necessarily bound by antibodies. 
C) is employed as an infection-fighting mechanism. 
D) is a malfunction of the immune system. 
E) will likely damage nearby cells.

Question 19

NK cells do all of the following EXCEPT

Accepted Answer

A) bind to Fc regions of bound antibodies. 
B) kill cells not expressing MHCI. 
C) participate in antibody dependent cell cytotoxicity. 
D) become activated by TH-2 cells. 
E) comprise 10-15% of circulating lymphocytes. 
A) bind to Fc regions of bound antibodies. 
B) kill cells not expressing MHCI. 
C) participate in antibody dependent cell cytotoxicity. 
D) become activated by TH-2 cells. 
E) comprise 10-15% of circulating lymphocytes.

Question 20

IL-2,produced by TH cells,

Accepted Answer

A) activates macrophages. 
B) stimulates TH cell maturation. 
C) causes phagocytosis. 
D) activates antigen-presenting cells. 
E) activates TC cells to CTLs. 
A) activates macrophages. 
B) stimulates TH cell maturation. 
C) causes phagocytosis. 
D) activates antigen-presenting cells. 
E) activates TC cells to CTLs.

Exam 17: Adaptive Immunity: Specific Defenses of the Host

Figure 17.2 -In Figure 17.2,which areas represent antigen-binding sites?

At a minimum,the human immune system is capable of recognizing approximately how many different antigens?

An antibody's Fc region can be bound by

Which of the following statements is NOT a possible outcome of antigen-antibody reaction?

Which of the following statements is FALSE?

The specificity of an antibody is due to

Figure 17.1 -In Figure 17.1,which letter on the graph indicates the highest antibody titer during the patient's response to a second and distinct/different antigen?

The following events elicit an antibody response.What is the third step?

In addition to IgG,the antibodies that can fix complement are

The variable region of the antibody is solely responsible for the response to the significant diversity of antigen targets.

Newborns' immunity due to the transfer of antibodies across the placenta is an example of

Which of the following statements about natural killer cells is FALSE?

The following events occur in cellular immunity,leading to a response from TH cells.What is the third step?

Cytokines are protein-based chemical messengers that allow for communication between cells of the immune system.

A Tᵣₑg cell deficiency could result in

Only dendritic cells produce interleukins.

The most abundant class of antibodies in serum is

A cell undergoing apoptosis

NK cells do all of the following EXCEPT

IL-2,produced by TH cells,

The Microbial World and You

Chemical Principles

Observing Microorganisms Through a Microscope

Functional Anatomy of Prokaryotic and Eukaryotic

Microbial Metabolism

Microbial Growth

The Control of Microbial Growth

Microbial Genetics

Biotechnology and Dna Technology

Classification of Microorganisms

The Prokaryotes: Domains Bacteria and Archaea

The Eukaryotes: Fungi, algae, protozoa, and Helminths

Viruses,viroids,and Prions

Principles of Disease and Epidemiology

Microbial Mechanisms of Pathogenicity

Innate Immunity: Nonspecific Defenses of the Host

Practical Applications of Immunology

Disorders Associated With the Immune System

Antimicrobial Drugs

Microbial Diseases of the Skin and Eyes

Microbial Diseases of the Nervous System

Microbial Diseases of the Cardiovascular and Lymphatic Systems

Microbial Diseases of the Respiratory System

Microbial Diseases of the Digestive System

Microbial Diseases of the Urinary and Reproductive Systems

Environmental Microbiology

Applied and Industrial Microbiology

Filters