Question 1

Which of the following play(s) no role in the B cell response?

Accepted Answer

A)  T-helper cells 
B)  Growth factors 
C)  Macrophages 
D)  Reverse transcriptase 
E)  Products of class II MHC genes

Question 2

B cells

Accepted Answer

A)  secrete antibodies. 
B)  present antigen on MHC II. 
C)  ingest antigens. 
D)  are part of the humoral response. 
E)  All of the above

Question 3

The production of _______ requires a clone of B cells that produce a large amount of a single antibody that binds to only one antigenic determinant.

Accepted Answer

The answer of The production of _______ requires a clone...

Question 4

Also known as antigenic determinants, _______ are specific sites on the antigen that are recognized by the immune system.

Accepted Answer

The answer of Also known as antigenic determinants, _______ are...

Question 5

Which of the following statements is false?

Accepted Answer

A)  MHC proteins are plasma membrane glycoproteins. 
B)  The major role of MHC proteins is to present antigens to T cell receptors. 
C)  Class I MHC proteins are found on the surface of every nucleated cell. 
D)  Class II MHC molecules are found on the surfaces of T cells. 
E)  All of the above are true; none is false.

Question 6

When the receptor of a TH cell binds to a pathogen presented on a macrophage, it

Accepted Answer

A)  inactivates itself. 
B)  secretes cytokines. 
C)  inactivates B cells. 
D)  inactivates the macrophage. 
E)  becomes a TC cell.

Question 7

If you were to design a vaccine to prevent infection with a mucosal pathogen, such as Vibrio cholerae, which antibody class do you think would be most effective in preventing the colonization in the intestinal tract?

Accepted Answer

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

Question 8

Even without treatment, some people survive as long as _______ years with HIV infection.

Accepted Answer

A)  0.5 
B)  2 
C)  4 
D)  10 
E)  20

Question 9

When an individual is first exposed to the smallpox virus, several days pass before significant numbers of specific antibody molecules and T cells are produced. However, a second exposure to the virus causes a large and rapid production of antibodies and T cells. This response is an example of

Accepted Answer

A)  antigenic determinants. 
B)  phytoalexins. 
C)  phagocytosis. 
D)  interferon production. 
E)  immunological memory.

Question 10

Which of the following is most likely responsible for fever during inflammation?

Accepted Answer

A)  Interferons 
B)  Complement proteins 
C)  Cytokines 
D)  Class I MHC proteins 
E)  Class II MHC proteins

Exam 42: Immunology: Animal Defense Systems