Which statement is true concerning IgM?
A)IgM is the first antibody produced during the initial response to an antigen.
B)IgM mediates many common allergic responses.
C)IgM is the most abundant class of immunoglobulins.
D)IgM is capable of crossing the human placenta.

Question

Quizplus · Accepted Answer

Typically, IgM is produced first (primary immune response), followed by IgG against the same antigen. IgE mediates allergic responses and is active in the defense against parasitic infections. IgG is the most abundant immunoglobulin class and can cross the human placenta to enter into fetal circulation.

Which Statement Is True Concerning IgM