Terrence has severe asthma and allergies, and is placed on a medication that blocks the functioning of IgE. How would this medication alleviate his symptoms?

Ted finds out that he has been exposed to measles. He is concerned that he might have contracted the disease, so he goes to see his physician. The physician takes a blood sample and sends it to a lab for antibody levels and titers. The results show an elevated level and activity of IgM antibodies to rubella (measles) virus but very few IgG antibodies to the virus. Has Ted contracted the disease?

Match the following antibody classes with their description:

a)   IgA.      b)  IgG.         c)  IgE.         d)  IgM.      e)  IgD.

___ First antibody produced during primary response.

___ Protects mucous membranes.

___ Most abundant antibody.

___ Found on the surface of B cells.

___ Triggers allergic reactions to allergens.

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

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

The cells involved in organ and transplant rejection are primarily B cells.

Which of the following is NOT an immunoglobin class?

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?