Which type of antibody is the main one in circulation?
A)IgA
B)IgM
C)IgG
D)IgE

Question

Quizplus · Accepted Answer

IgG is the main antibody in circulation, accounting for approximately 75% of all immunoglobulins present in the body. It is also the only antibody that can pass through the placenta, providing passive immunity to the fetus. IgA is found in mucosal secretions such as saliva, tears, and breast milk, while IgM is the first antibody produced in response to an infection. IgE is involved in allergic reactions.

Which Type of Antibody Is the Main One in Circulation