_____ is secreted into the bloodstream,whereas _____ is secreted into mucus such as gastrointestinal fluid,colostrum,saliva,tears,and sweat.

Question

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Monomeric IgA is secreted into the bloodstream, whereas dimeric IgA is secreted into mucus such as gastrointestinal fluid, colostrum, saliva, tears, and sweat. This is because the J chain, which is necessary for the formation of dimers or higher order structures, is only present in secretory IgA. Monomeric IgM and pentameric IgM are both secreted into the bloodstream, while IgG does not exist in a dimeric form.

_____ Is Secreted into the Bloodstream,whereas _____ Is Secreted into Mucus

_ Is Secreted into the Bloodstream,whereas _ Is Secreted into Mucus