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

Match the following antibody classes with their description: 

a) IgA.

b)  IgG.

c)  IgE.

___ First antibody produced during primary response. 

___ Protects mucous membranes.  

___ Most abundant antibody. 

___ Found on the surface of B cells. 

___ Triggers allergic reactions to allergens.

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

a. IgA

b. IgD

c. IgE

d. IgG

e. IgM

Antibodies that protect the fetus and newborn.

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 opsonization, and which antibodies have opsonizing activity?

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

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?