What percentage of the immunoglobulin pool does IgA account for?

The correct percentage of the immunoglobulin pool that IgA accounts for is approximately 10-15%. IgA is the second most abundant immunoglobulin in the serum, following IgG, and plays a crucial role in mucosal immunity. It is primarily found in mucosal areas such as the gut and respiratory tract, as well as in secretions like saliva, tears, and breast milk.

In the context of the overall immunoglobulin distribution, IgA typically constitutes about 10-15% of the total immunoglobulin pool. This immunoglobulin is important because it helps to protect mucosal surfaces from pathogens by binding to antigens and preventing their adherence and entry into body tissues.

Understanding this distribution is essential in immunology and serology, as it highlights the functional diversity of immunoglobulins and their respective roles in the immune response. Knowing the proportions of different immunoglobulins can aid in diagnosing certain conditions or understanding immune system function.