antibody immunoglobins

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5 Terms

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IgG

Most abundant in blood; provides long-term immunity; crosses the placenta to protect the fetus

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IgA

Found in mucosal areas (respiratory, digestive, urogenital tracts); protects against pathogens in secretions like saliva, tears, and breast milk.

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IgM

First antibody produced in an immune response; excellent at forming antigen-antibody complexes.

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IgE

Involved in allergic reactions and defense against parasites; binds to mast cells and basophils.

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IgD

Functions mainly as a receptor on immature B cells; role in initiating B cell activation.