Which antibody class crosses the placenta from mother to child?

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?

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

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

Which of the following antibodies is involved in causing basophils to release histamine when the antibody encounters an allergen?

The primary B-cell receptor is:

Each class of antibody is specifically defined by its