List the antibody isotype(s) that exhibit the stated feature. Some features will be assigned to more than one antibody.
Feature:
Most abundant antibody in serum
Made as a dimer
Stimulates allergic responses
Does not cross the placenta
Considered a complement activator
Rare antibody that’s poorly characterized
Main antibody in breast milk and mucus
Dominates the secondary immune response
Made early in the course of infection
Made in a primary immune response

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

a. IgA

b. IgD

c. IgE

d. IgG

e. IgM

The first antibodies synthesized; especially effective against microorganisms.

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.

What is IgA protease, and what effect would it possibly have on host immune function?

What is opsonization, and which antibodies have opsonizing activity?

Which type of hypersensitivity is not antibody mediated?

a. Type I hypersensitivities

b. Type II hypersensitivities

c. Type III hypersensitivities

d. Type IV hypersensitivities

e. Antibodies mediate all of these.

Which of the following is NOT an immunoglobin class?

______ is the first immunoglobulin class produced during a primary response.

Which antibody class crosses the placenta from mother to child?