Antibody
Which is not a function of IgA?

Protect mucosal surfaces
Protect eyes
Fix complement
Agglutinate antigen

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Antibody
The secretary component of sIgA is

formed by cleavage of an epithelial cell receptor used to transport the dimeric IgA across the epithelial cell
added to dimeric IgA by the M cell
made by T cells
made by plasma cells that secrete dimeric IgA

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