31) What specific type of acquired immunity do vaccines provide:

A) naturally acquired active immunity

B) naturally acquired passive immunity

C) artificially acquired active immunity

D) artificially acquired passive immunity

E) naturally acquired artificial immunity

32) Vaccines are NOT for:

A) pneumonia

B) tetanus

C) measles

D) snake bites

E) polio

33) Immune sera are used for all of the following EXCEPT:

A) tuberculosis

B) rabies

C) snake bites

D) botulism

E) tetanus

34) Which portion of the antibody’s structure determines its antibody class:

A) variable region

B) heavy chain

C) constant region

D) disulfide bonds

E) light chain

35) Which one of the following is NOT true of the constant (C) regions of antibodies:

A) they are the same or nearly the same

B) they form the “stem” of an antibody

C) they determine the specific type of antibody class formed

D) they form an antigen-binding site

E) they determine how an antibody class will carry out its immune role

36) Which one of the following is NOT one of the antibody classes:

A) IgA

B) IgB

C) IgD

D) IgG

E) IgE

37) IgA:

A) is mainly found in mucus and secretions such as tears and saliva

B) is passed from mother to fetus during pregnancy

C) is the most abundant antibody in blood plasma

D) can fix complement

E) is involved in allergies

38) Which one of the following is NOT a method by which antibodies inactivate antigens:

A) agglutination

B) chemotaxis

C) complement fixation

D) neutralization

E) precipitation

39) The specific antibody class that has the ability to cross the placental barrier and provide immunity to the fetus is:

A) IgM

B) IgA

C) IgD

D) IgG

E) IgE

40) The process by which antibodies bind to specific sites on bacterial exotoxins (toxic chemicals secreted by bacteria) to block their harmful effects is called:

A) agglutination

B) chemotaxis

C) complement fixation

D) neutralization

E) precipitation