The most abundant type of antibody is
A) IgA.
B) IgD.
C) IgE.
D) IgG.
E) IgM.

Question

Quizplus · Accepted Answer

IgG is the most abundant type of antibody in the human body, accounting for approximately 75% of total serum antibodies. It is responsible for long-lasting immunity against pathogens and can cross the placenta from a mother to her fetus, providing passive immunity. IgA is the second most abundant antibody, found in secretions such as saliva, tears, and breast milk. IgM is the first antibody produced in response to an infection, but it is not as abundant as IgG. IgD and IgE have specialized functions in the immune system and are present in smaller amounts.

The Most Abundant Type of Antibody Is