Question

which type of antibody is the main one in circulation?
a iga
b igm
c igg
d ige

Explanation:

To determine the main antibody in circulation, we analyze each option:

• Option A (IgA): Primarily found in mucosal areas (e.g., respiratory, digestive tracts) and secretions like saliva, not the main circulating antibody.
• Option B (IgM): The first antibody produced in an immune response but is not the most abundant in circulation long - term.
• Option C (IgG): Constitutes about 75 - 80% of the total antibodies in the blood circulation. It has multiple functions including neutralizing toxins, opsonizing pathogens, and activating the complement system.
• Option D (IgE): Involved in allergic reactions and defense against parasites, present in very low concentrations in the circulation.

Answer:

C. IgG