Immunoglobulin A/IgA - Prevents bacteria and viruses from attaching to mucus // Act as mucosal antibody// passive immunity on nursing infants// act as first line defense, Immunoglobulin D/IgD - Act as receptors for antigen on B cells surface // Involved in the activation on lymphocyte B cells, Immunoglobulin E/IgE - Involves in hypersensitive reaction that produces allergies//trigger release of histamine from mast cells and basophile // involve in allergic reaction, Immunoglobulin G/IgG Immunoglobulin G/IgG   - Act as markers that stimulate phagocytosis by macrophages// promotes phagocytosis// protect against bacteria/viruses/toxin// involve in secondary immune response, Immunoglobulin M/IgM - Acts as receptors on the lymphocytes surface// bind many antigen at once// effective in clumping viruses/bacteria// involve in primary immune response,

Explain the functions of the different classes of antibodies.

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