Which is the major form of antibody in external secretions?
A)IgM
B)IgG
C)IgD
D)IgA
E)IgE

Name: Which is the major form of antibody in external secretions? A)IgM B)IgG C)IgD D)IgA E)IgE
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IgA is the major form of antibody found in external secretions such as tears, saliva, mucus, and breast milk. It plays an important role in protecting mucosal surfaces from pathogens. IgM, IgG, IgD, and IgE are found mainly in the bloodstream.

Which Is the Major Form of Antibody in External Secretions