IgD antibodies
A) decline in levels as IgG production accelerates.
B) are important in the allergic response.
C) are the anti-Rh antibodies produced by Rh-negative mothers.
D) attack bacteria insensitive to IgG.
E) bind antigens in the extracellular fluid to B cells.

Question

Quizplus · Accepted Answer

IgD antibodies bind antigens in the extracellular fluid to B cells, helping to stimulate their activation and proliferation. IgD levels remain relatively stable and do not decline as IgG production accelerates or play a major role in the allergic response. They are not the anti-Rh antibodies produced by Rh-negative mothers and do not attack bacteria insensitive to IgG.

IgD Antibodies