Question 1

Which are the first to attack cancer cells and virus-infected cells?

Accepted Answer

A)  helper T cells
B)  suppressor T cells
C)  cytotoxic T cells
D)  delayed hypersensitivity T cells
E)  natural killer (NK)  cellsF) B) and E)
G) B) and C)

Question 2

Describe the major histocompatability complex with regard to its: a) location, b) composition, c) relationship to specific cell markers, and d) role in regulation of immune reactions.

Accepted Answer

The major histocompatibility complex (MH...

Question 3

The molecular fragment on an antigen molecule that a lymphocyte recognizes and responds to is called a/an

Accepted Answer

A)  epitope.
B)  hapten.
C)  antigen binding site.
D)  variable region.
E)  None of the choices are correct.F) C) and D)
G) All of the above

Question 4

After secreting antibodies during an immune response, plasma cells then differentiate into memory cells.

Accepted Answer

A) True 
 B)False

Question 5

Which process involves a more rapid synthesis and greatly increased titer of antibody when the immune system is subsequently exposed to the same antigen?

Accepted Answer

A)  Neutralization
B)  Opsonization
C)  Complement fixation
D)  Agglutination
E)  Anamnestic responseF) B) and E)
G) D) and E)

Question 6

The bone marrow is where

Accepted Answer

A)  immune responses to antigen occur.
B)  blood stem cells give rise to immature lymphocytes.
C)  antigen is filtered from the blood.
D)  antigen is filtered from tissue fluid.
E)  T lymphocytes complete maturation.F) D) and E)
G) None of the above

Question 7

The immunoglobulin class that has an Fc region that binds to receptors on basophils and mast cells is

Accepted Answer

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

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

Lymphocytes A.possess MHC antigens for recognizing self.

Accepted Answer

A)  possess MHC antigens for recognizing self.
B)  have membrane receptors that recognize foreign antigens.
C)  gain tolerance to self by destruction of lymphocytes that could react against self.
D)  develop into clones of B and T cells with extreme variations of specificity.
E)  all of the choices are correct.F) A) and E)
G) A) and D)

Question 10

Plasma cells

Accepted Answer

A)  secrete antibodies.
B)  function in allergic reactions.
C)  directly destroy target cells.
D)  suppress immune reactions.
E)  activate B cells and other T cells.F) A) and B)
G) A) and E)

Question 11

The immunoglobulin/s found on the surface of B cells is/are

Accepted Answer

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

Question 12

Sam works in construction and stepped on a sharp nail.He can't remember the last time he had a tetanus shot.What type of immunity is the most important for him to receive?

Accepted Answer

A)  Natural active immunity
B)  Artificial passive immunity
C)  Natural passive immunity
D)  Artificial active immunity
E)  None of the choices will help him.F) C) and D)
G) A) and D)

Question 13

Antigens that elicit allergic reactions are called _____.

Accepted Answer

The answer of Antigens that elicit allergic reactions are called...

Question 14

Each genetically distinct group of lymphocytes that possesses the same specificity is called a _____.

Accepted Answer

The answer of Each genetically distinct group of lymphocytes that...

Question 15

Discuss, in detail, all the genetic and cellular events encompassed in the clonal selection theory of lymphocyte development.

Accepted Answer

The clonal selection theory of lymphocyt...

Question 16

Describe the characteristics that distinguish the following: a) antigen, b) hapten, c) antigenic determinant, d) alloantigen, e) heterophilic antigen, and f) autoantigen.

Accepted Answer

a) Antigen: An antigen is a substance th...

Question 17

Toxoids

Accepted Answer

A)  contain modified bacterial exotoxin molecules.
B)  are always genetically engineered.
C)  contain select antigenic components of a pathogen rather than whole cells or viruses.
D)  confer passive immunity.
E)  All of the choices are correct.F) None of the above
G) A) and B)

Question 18

Monoclonal antibodies

Accepted Answer

A)  originate from a single B cell clone.
B)  have a single specificity for antigen.
C)  are secreted by hybridomas.
D)  are used in immunology lab tests and cancer therapy.
E)  All of the choices are correct.F) A) and E)
G) All of the above

Question 19

The most significant cells in graft rejection are

Accepted Answer

A)  helper T cells.
B)  suppressor T cells.
C)  cytotoxic T cells.
D)  B cells.
E)  natural killer (NK)  cells.F) B) and D)
G) A) and B)

Question 20

Scientists are currently developing bananas that synthesize proteins from pathogens, as a delivery system to vaccinate populations that otherwise would not have access to them.

Accepted Answer

A) True 
 B)False

Exam 15: Adaptive, Specific Immunity and Immunization

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

Correct AnswerverifiedShow Answer

Which process involves a more rapid synthesis and greatly increased titer of antibody when the immune system is subsequently exposed to the same antigen?

Correct AnswerverifiedShow Answer

Antigens that elicit allergic reactions are called _____.

Correct AnswerverifiedShow Answer

The immunoglobulin class that has an Fc region that binds to receptors on basophils and mast cells is

Correct AnswerverifiedShow Answer

After secreting antibodies during an immune response, plasma cells then differentiate into memory cells.

Correct AnswerverifiedShow Answer

Lymphocytes A.possess MHC antigens for recognizing self.

Correct AnswerverifiedShow Answer

The most significant cells in graft rejection are

Correct AnswerverifiedShow Answer

Monoclonal antibodies

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Describe the major histocompatability complex with regard to its: a) location, b) composition, c) relationship to specific cell markers, and d) role in regulation of immune reactions.

Correct AnswerAnswered by ExamLex AIThe major histocompatibility complex (MH...View AnswerShow Answer

Plasma cells

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The molecular fragment on an antigen molecule that a lymphocyte recognizes and responds to is called a/an

Correct AnswerverifiedShow Answer

The immunoglobulin/s found on the surface of B cells is/are

Correct AnswerverifiedShow Answer

The bone marrow is where

Correct AnswerverifiedShow Answer

Toxoids

Correct AnswerverifiedShow Answer

Sam works in construction and stepped on a sharp nail.He can't remember the last time he had a tetanus shot.What type of immunity is the most important for him to receive?

Correct AnswerverifiedShow Answer

Each genetically distinct group of lymphocytes that possesses the same specificity is called a _____.

Correct AnswerverifiedShow Answer

Scientists are currently developing bananas that synthesize proteins from pathogens, as a delivery system to vaccinate populations that otherwise would not have access to them.

Correct AnswerverifiedShow Answer

Describe the characteristics that distinguish the following: a) antigen, b) hapten, c) antigenic determinant, d) alloantigen, e) heterophilic antigen, and f) autoantigen.

Correct AnswerAnswered by ExamLex AIa) Antigen: An antigen is a substance th...View AnswerShow Answer

Discuss, in detail, all the genetic and cellular events encompassed in the clonal selection theory of lymphocyte development.

Correct AnswerAnswered by ExamLex AIThe clonal selection theory of lymphocyt...View AnswerShow Answer

Which are the first to attack cancer cells and virus-infected cells?

Correct AnswerverifiedShow Answer

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The major histocompatibility complex (MH...
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a) Antigen: An antigen is a substance th...
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The clonal selection theory of lymphocyt...
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