Question 1

Secretory IgA antibodies are unique because they

Accepted Answer

A)  have unique light chains. 
B)  are Y-shaped molecules. 
C)  are present in the plasma. 
D)  are connected with J chains and short polypeptides to form dimers. 
E)  are present in lymph nodes. 
A)  have unique light chains. 
B)  are Y-shaped molecules. 
C)  are present in the plasma. 
D)  are connected with J chains and short polypeptides to form dimers. 
E)  are present in lymph nodes. D

Question 2

Vaccination triggers an immune response which produces ________ immunity.

Accepted Answer

A)  artificial passive 
B)  natural passive 
C)  natural active 
D)  artificial active 
E)  both active and passive 
A)  artificial passive 
B)  natural passive 
C)  natural active 
D)  artificial active 
E)  both active and passive D

Question 3

Adaptive immunity is sometimes also called acquired immunity.Which of the following statements provides a basis for the alternative name?

Accepted Answer

A)  Lymphocytes of the adaptive immune system are highly specific for a single antigenic determinant. 
B)  Activated lymphocytes produce daughter cells that are identical in specificity and function. 
C)  To become activated, lymphocytes require exposure to the antigenic determinant for which they are specific. 
D)  Activated lymphocytes may persist for years in the body. 
E)  Lymphocytes reactive to normal body components are removed. 
A)  Lymphocytes of the adaptive immune system are highly specific for a single antigenic determinant. 
B)  Activated lymphocytes produce daughter cells that are identical in specificity and function. 
C)  To become activated, lymphocytes require exposure to the antigenic determinant for which they are specific. 
D)  Activated lymphocytes may persist for years in the body. 
E)  Lymphocytes reactive to normal body components are removed. C

Question 4

Enhanced immune responses to subsequent exposures to an antigen to which the body has already been exposed are known as ________ responses.

Accepted Answer

A)  third-degree immune 
B)  allergic 
C)  primary immune 
D)  memory 
E)  autoimmune 
A)  third-degree immune 
B)  allergic 
C)  primary immune 
D)  memory 
E)  autoimmune

Question 5

The body recognizes antigens by the three-dimensional shapes of regions known as (antigenic/antibody/immunologic)determinants.

Accepted Answer

The answer of The body recognizes antigens by the three-dimensional...

Question 6

Which of the following is true of chemokines?

Accepted Answer

A)  They ensure production of enough leukocytes. 
B)  They are involved in B lymphocyte activation and differentiation. 
C)  They are chemotactic factors for leukocytes. 
D)  They cause basophils and eosinophils to degranulate. 
E)  They are substances used to signal between leukocytes. 
A)  They ensure production of enough leukocytes. 
B)  They are involved in B lymphocyte activation and differentiation. 
C)  They are chemotactic factors for leukocytes. 
D)  They cause basophils and eosinophils to degranulate. 
E)  They are substances used to signal between leukocytes.

Question 7

TCRs only recognize antigens presented by APC; therefore,(BCR/MHC/Th1)molecules ultimately determine which epitopes elicit an immune response.

Accepted Answer

The answer of TCRs only recognize antigens presented by APC;...

Question 8

CTLs use the CD95 molecule to recognize their epitope.

Accepted Answer

A) True 
 B)False

Question 9

IgE antibodies are best described as

Accepted Answer

A)  a cause of basophil and eosinophil degranulation. 
B)  the antibodies found in body secretions. 
C)  those involved in complement activation. 
D)  the trigger for antibody-dependent cellular toxicity (ADC
C) . 
E)  the most common type of antibody in the blood during the initial phases of an immune 
A)  a cause of basophil and eosinophil degranulation. 
B)  the antibodies found in body secretions. 
C)  those involved in complement activation. 
D)  the trigger for antibody-dependent cellular toxicity (ADC
C) . 
E)  the most common type of antibody in the blood during the initial phases of an immune

Question 10

Which of the following recognizes and binds to MHC I proteins and helps stabilize the binding of epitopes to T cell receptors?

Accepted Answer

A)  CD8 
B)  MHC I 
C)  CD26 
D)  CD4 
E)  CD95 
A)  CD8 
B)  MHC I 
C)  CD26 
D)  CD4 
E)  CD95

Question 11

Which of the following statements regarding the lymphatic system is FALSE?

Accepted Answer

A)  Lymph fluid is similar to blood plasma. 
B)  The lymphatic vessels contract to move lymphatic fluid. 
C)  The lymphatic vessels have valves to control the direction of fluid flow. 
D)  The lymphatic system begins with highly permeable capillaries. 
E)  Fluid flows through lymph nodes on its way to the bloodstream. 
A)  Lymph fluid is similar to blood plasma. 
B)  The lymphatic vessels contract to move lymphatic fluid. 
C)  The lymphatic vessels have valves to control the direction of fluid flow. 
D)  The lymphatic system begins with highly permeable capillaries. 
E)  Fluid flows through lymph nodes on its way to the bloodstream.

Question 12

Cytokines are soluble regulatory proteins that act as intercellular signals and include substances such as interleukins,interferon,and growth factors.

Accepted Answer

A) True 
 B)False

Question 13

Antigens are

Accepted Answer

A)  specific molecules, or parts of molecules, that the body recognizes as foreign. 
B)  proteins the body produces against invading substances. 
C)  cells that protect the body against invaders. 
D)  proteins on the surface of our cells to which pathogens attach. 
E)  enzymes secreted to destroy a pathogen's cell wall. 
A)  specific molecules, or parts of molecules, that the body recognizes as foreign. 
B)  proteins the body produces against invading substances. 
C)  cells that protect the body against invaders. 
D)  proteins on the surface of our cells to which pathogens attach. 
E)  enzymes secreted to destroy a pathogen's cell wall.

Question 14

An antigen produced by a pathogen while living inside a cell is known as an (auto-/endogenous/exogenous)antigen.

Accepted Answer

The answer of An antigen produced by a pathogen while...

Question 15

Accepted Answer

A)  antigen presenting cell and a B lymphocyte. 
B)  antigen presenting cell and a T lymphocyte 
C)  NK cell and its target cell. 
D)  CTL and its target cell. 
E)  antigen presenting cell and a plasma cell. 
A)  antigen presenting cell and a B lymphocyte. 
B)  antigen presenting cell and a T lymphocyte 
C)  NK cell and its target cell. 
D)  CTL and its target cell. 
E)  antigen presenting cell and a plasma cell.

Question 16

The MALT lacks the tough outer capsule of a lymph node but functions in the same way.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following statements about T lymphocytes is FALSE?

Accepted Answer

A)  T lymphocytes produce antibody molecules. 
B)  T lymphocytes directly attack cells and produce the cell-mediated immune response. 
C)  T lymphocytes are called such because they mature in the thymus. 
D)  T lymphocytes have TCRs that recognize antigen only if it is bound to MHC. 
E)  There are three types of T lymphocytes. 
A)  T lymphocytes produce antibody molecules. 
B)  T lymphocytes directly attack cells and produce the cell-mediated immune response. 
C)  T lymphocytes are called such because they mature in the thymus. 
D)  T lymphocytes have TCRs that recognize antigen only if it is bound to MHC. 
E)  There are three types of T lymphocytes.

Question 18

The ability of the body to respond faster and more effectively to a second exposure to pathogens is called immunologic (memory/synapse/tolerance).

Accepted Answer

The answer of The ability of the body to respond...

Question 19

A variety of molecular components of the adaptive immune system bind epitopes (antigenic determinants).Compare and contrast the binding of epitopes by antibody molecules,T cell receptors (TCRs),and MHC molecules,and describe the consequences of the different interactions.

Accepted Answer

MHC molecules bind processed antigen for

Question 20

A sick child may have influenza or RSV.These virus infections have different treatment options,so the physician requests antibody titer tests.The results are as follows: anti-influenza antibodies are primarily IgM,and anti-RSV antibodies are all IgA and IgG.Which of the following is the most appropriate interpretation?

Accepted Answer

A)  the child has a current RSV infection and was previously exposed to influenza. 
B)  the child currently has influenza and has previously been exposed to RSV. 
C)  the child has concurrent influenza and RSV infections. 
D)  the child has neither influenza nor RSV. 
E)  the results do not provide sufficient data to draw a conclusion. 
A)  the child has a current RSV infection and was previously exposed to influenza. 
B)  the child currently has influenza and has previously been exposed to RSV. 
C)  the child has concurrent influenza and RSV infections. 
D)  the child has neither influenza nor RSV. 
E)  the results do not provide sufficient data to draw a conclusion.

Exam 16: Adaptive Immunity

Secretory IgA antibodies are unique because they

Vaccination triggers an immune response which produces ________ immunity.

Adaptive immunity is sometimes also called acquired immunity.Which of the following statements provides a basis for the alternative name?

Enhanced immune responses to subsequent exposures to an antigen to which the body has already been exposed are known as ________ responses.

The body recognizes antigens by the three-dimensional shapes of regions known as (antigenic/antibody/immunologic)determinants.

Which of the following is true of chemokines?

TCRs only recognize antigens presented by APC; therefore,(BCR/MHC/Th1)molecules ultimately determine which epitopes elicit an immune response.

CTLs use the CD95 molecule to recognize their epitope.

IgE antibodies are best described as

Which of the following recognizes and binds to MHC I proteins and helps stabilize the binding of epitopes to T cell receptors?

Which of the following statements regarding the lymphatic system is FALSE?

Cytokines are soluble regulatory proteins that act as intercellular signals and include substances such as interleukins,interferon,and growth factors.

Antigens are

An antigen produced by a pathogen while living inside a cell is known as an (auto-/endogenous/exogenous)antigen.

The MALT lacks the tough outer capsule of a lymph node but functions in the same way.

Which of the following statements about T lymphocytes is FALSE?

The ability of the body to respond faster and more effectively to a second exposure to pathogens is called immunologic (memory/synapse/tolerance).

A variety of molecular components of the adaptive immune system bind epitopes (antigenic determinants).Compare and contrast the binding of epitopes by antibody molecules,T cell receptors (TCRs),and MHC molecules,and describe the consequences of the different interactions.

A Brief History of Microbiology

The Chemistry of Microbiology

Cell Structure and Function

Microscopy, Staining, and Classification

Microbial Metabolism

Microbial Nutrition and Growth

Microbial Genetics

Recombinant DNA Technology

Controlling Microbial Growth in the Environment

Controlling Microbial Growth in the Body: Antimicrobial Drugs

Characterizing and Classifying Prokaryotes

Characterizing and Classifying Eukaryotes

Characterizing and Classifying Viruses, Viroids, and Prions

Infection, Infectious Diseases, and Epidemiology

Innate Immunity

Immunization and Immune Testing

Immune Disorders

Pathogenic Gram Positive Bacteria

Pathogenic Gram-Negative Cocci and Bacilli

Rickettsias, Chlamydias, Spirochetes, and Vibrios

Pathogenic Fungi

Parasitic Protozoa, Helminths, and Arthropod Vectors

Pathogenic DNA Viruses

Pathogenic RNA Viruses

Applied and Environmental Microbiology

Filters