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Which of the following immunoglobulins is also called secretory immunoglobulin?(a) IgG(b) IgA(c) IgM(d) IgEThe question was posed to me during an online exam.The origin of the question is Human Health and Disease topic in division Human Health and Disease of Biology – Class 12

Answer»

Right option is (b) IgA

Explanation: IgA immunoglobulins are also called secretory immunoglobulin because it is present in all the body secretions including colostrum and mother’s milk. It functions as the first LINE of defence against ingested and INHALED PATHOGENS by activating alternative PATHWAYS of the complement system.



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