20. Adaptive Immunity

Match the following choices to the statements in questions 5–7:

a. IgA

b. IgD

c. IgE

d. IgG

e. IgM

Antibodies that are bound to mast cells and involved in allergic reactions.

The immunoglobulin class that mediates type I hypersensitivity is:

a. IgA

b. IgM

c. IgG

d. IgD

e. IgE

_______ is the immunoglobulin class that neutralizes viruses in the intestinal tract.

What is opsonization, and which antibodies have opsonizing activity?