The predominant class of antibody produced in the primary immune response is
A) IgM
B) IgG
C) IgD
D) IgA
E) IgE

Question

Quizplus · Accepted Answer

During the primary immune response, the predominant class of antibody produced is IgM, which is the first antibody to be produced by B cells after exposure to an antigen. IgM is efficient at activating complement and is therefore important in clearing pathogens. IgG is produced later in the primary immune response and in larger quantities during the secondary immune response. IgD and IgA are primarily found as membrane-bound antibodies on B cells or mucosal surfaces, respectively. IgE is involved in allergic reactions and parasitic infections.

The Predominant Class of Antibody Produced in the Primary Immune