Question 1

Small foreign molecules that are too small by themselves to elicit an immune response are termed ______.

Accepted Answer

A)  haptens
B)  antigen binding sites
C)  epitopes
D)  variable regionsE) A) and D)
F) A) and C)

Question 2

The array of potential antibodies to the variety of possible antigens is amazing.Which statement explains this development?

Accepted Answer

A)  Mutations in the antibody gene occur within the activated B cells, since they meet the antigen.
B)  The existing antibody molecules change their shapes, allowing them to fit with a large number of antigens.
C)  There is a shuffling of genes that code for self markers as well as nonself markers, mixing them together and producing reactive lymphocytes to those markers.
D)  Recombination of genes coding for the variable regions of immunoglobulins occurs during the developmental stage of lymphocyte production.E) A) and B)
F) A) and C)

Question 3

What process generates many B cells and T cells that are activated against specific antigens?

Accepted Answer

A)  Antigen expression
B)  Antigen presentation
C)  Clonal expansion
D)  Antibody production
E)  OpsonizationF) B) and E)
G) A) and D)

Question 4

The hinge region of an antibody has a hypervariable amino acid region where the antigenic determinant fits.

Accepted Answer

A) True 
 B)False

Question 5

Antitoxins

Accepted Answer

A)  are always genetically engineered.
B)  confer passive immunity.
C)  contain select antigenic components of a pathogen rather than whole cells or viruses.
D)  utilize DNA strands that will produce the antigen.
E)  contain modified bacterial exotoxin molecules.F) A) and B)
G) C) and E)

Question 6

An example of artificial passive immunity would be

Accepted Answer

A)  chickenpox infection, followed by lifelong immunity.
B)  chickenpox vaccine triggering extended immunity to chickenpox.
C)  giving a person immune serum globulins to chickenpox virus after exposure to the disease.
D)  a fetus acquiring maternal IgG to the chickenpox virus across the placenta.E) A) and C)
F) B) and D)

Question 7

Autoimmune disorders are characterized by immune destruction of self tissues.The underlying basis of these disorders is

Accepted Answer

A)  lack of an anamnestic response.
B)  an overproduction of complement.
C)  a lack of immune tolerance.
D)  an oversecretion of antibodies from memory B cells.E) B) and C)
F) A) and C)

Question 8

The immunoglobulin class that is the only one capable of crossing the placenta is ______.

Accepted Answer

A)  IgA
B)  IgG
C)  IgM
D)  IgD
E)  IgEF) C) and E)
G) A) and C)

Question 9

The most abundant class of antibodies in serum is _____.

Accepted Answer

A)  IgE
B)  IgM
C)  IgA
D)  IgG
E)  IgDF) B) and E)
G) D) and E)

Question 10

The major histocompatibility complex is

Accepted Answer

A)  a set of glycoproteins, called MHC antigens, found on all body cells.
B)  a set of genes that code for MHC glycoproteins.
C)  found on the third chromosome.
D)  located in the thymus gland.
E)  All of the choices are correct.F) A) and B)
G) A) and E)

Question 11

Clonal selection requires the presence of foreign antigens.

Accepted Answer

A) True 
 B)False

Question 12

Human B lymphocytes mature in an intestinal region called the bursa.

Accepted Answer

A) True 
 B)False

Question 13

The adaptive immune response differs from the innate response in that

Accepted Answer

A)  memory.
B)  B and T lymphocytes can each target multiple proteins, whereas the innate response targets only a single type of antigen.
C)  the adaptive immune response involves physical barriers and nonspecific processes, whereas the innate immune response relies on the actions of B and T lymphocytes.
D)  the innate immune response targets a specific immunogen and remembers it to mount an even stronger response on subsequent encounters with that immunogen, whereas the adaptive response is nonspecific and has no memory.E) B) and C)
F) C) and D)

Exam 15: Host Defenses II: Specific Immunity and Immunization

What process generates many B cells and T cells that are activated against specific antigens?

Correct Answer
verified

The major histocompatibility complex is

Correct Answer
verified

Small foreign molecules that are too small by themselves to elicit an immune response are termed ______.

Correct Answer
verified

The adaptive immune response differs from the innate response in that

Correct Answer
verified

Antitoxins

Correct Answer
verified

An example of artificial passive immunity would be

Correct Answer
verified

Autoimmune disorders are characterized by immune destruction of self tissues.The underlying basis of these disorders is

Correct Answer
verified

The array of potential antibodies to the variety of possible antigens is amazing.Which statement explains this development?

Correct Answer
verified

Clonal selection requires the presence of foreign antigens.

Correct Answer
verified

The immunoglobulin class that is the only one capable of crossing the placenta is ______.

Correct Answer
verified

The hinge region of an antibody has a hypervariable amino acid region where the antigenic determinant fits.

Correct Answer
verified

Human B lymphocytes mature in an intestinal region called the bursa.

Correct Answer
verified

The most abundant class of antibodies in serum is _____.

Correct Answer
verified

Exam 15: Host Defenses II: Specific Immunity and Immunization

What process generates many B cells and T cells that are activated against specific antigens?

Correct AnswerverifiedShow Answer

The major histocompatibility complex is

Correct AnswerverifiedShow Answer

Small foreign molecules that are too small by themselves to elicit an immune response are termed ______.

Correct AnswerverifiedShow Answer

The adaptive immune response differs from the innate response in that

Correct AnswerverifiedShow Answer

Antitoxins

Correct AnswerverifiedShow Answer

An example of artificial passive immunity would be

Correct AnswerverifiedShow Answer

Autoimmune disorders are characterized by immune destruction of self tissues.The underlying basis of these disorders is

Correct AnswerverifiedShow Answer

The array of potential antibodies to the variety of possible antigens is amazing.Which statement explains this development?

Correct AnswerverifiedShow Answer

Clonal selection requires the presence of foreign antigens.

Correct AnswerverifiedShow Answer

The immunoglobulin class that is the only one capable of crossing the placenta is ______.

Correct AnswerverifiedShow Answer

The hinge region of an antibody has a hypervariable amino acid region where the antigenic determinant fits.

Correct AnswerverifiedShow Answer

Human B lymphocytes mature in an intestinal region called the bursa.

Correct AnswerverifiedShow Answer

The most abundant class of antibodies in serum is _____.

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified