The immunoglobulin that protects body surfaces such as mucosal surfaces from foreign microorganisms is

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Quizplus · Accepted Answer

IgA is the immunoglobulin that protects body surfaces such as mucosal surfaces from foreign microorganisms. It is found in secretions such as tears, saliva, and breast milk and is the first line of defense against pathogens that enter through the nose, mouth, and other body openings. IgG, IgE, and IgM are important for other aspects of the immune response but are not specialized for surface protection.

The Immunoglobulin That Protects Body Surfaces Such as Mucosal Surfaces