Match the following antibodies with the correct definition.
____IgD     
____IgM     
____IgG     
____IgA     
____IgE
a. Antibody found in secretions
b. Most common antibody; crosses the placenta
c. Antibody involved in allergies and parasitic infections
d. Pentamer and potent agglutinating agent
e. Antibody bound to the B cell plasma membrane

More than one choice may apply.

Which of these antibody classes is usually arranged as a pentamer?

a. IgG

b. IgM

c IgA

d. IgD

T cells and B cells are produced in the:

Binding of antigens to receptors of immunocompetent lymphocytes leads to clonal selection. Describe the process of clonal selection. What nonlymphocyte cell is a central actor in this process, and what is its function?

Define antibody. Using an appropriately labeled diagram, describe the structure of an antibody monomer. Indicate and label variable and constant regions, heavy and light chains.

The humoral response is initiated by production of:

Name the five classes of immunoglobulins. Which is most likely to be found attached to a B cell membrane? Which is most abundant in plasma? Which is important in allergic responses? Which is the first Ig to be released during the primary response? Which can cross the placental barrier?

How does the formation of an antigen–antibody complex cause the elimination of an antigen?

Mark the following statements as true or false. If a statement is false, correct is to make a true statement.

d. Vaccinations are given to induce the production of the inflammatory response.