eview View Tell me what you want to do 80. The FcaRI receptor binds to opsonized

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eview View Tell me what you want to do 80. The FcaRI receptor binds to opsonized antigens a. dimeric IgA b. IgM c. IghE d. IgG e. monomeric IgA antigen complexes and facilitates the phagocytosis of Essay questions 9-1 How does IgE induce the forcible ejection of parasites and toxic substances from the 9-2 A. What is meant by the term "passive transfer of immunity," and how is it achieved? respiratory and gastrointestinal tracts? Give examples. B. Give the isotype of the antibodies involved in (i) placental transfer and (ii) transfer into breast milk, and explain why these antibodies are important. Chapter 10: 81. Because the mucosaethis tissue is predisposed to infection. a. constitute thin, permeable barriers secrete a continuous layer of mucus

Explanation / Answer

80. Answer: A) dimeric IgA

The binding of FcA was not seen with monomeric forms of the IgA, whereas, it had been observed that the dimeric form of IgA showed ten fold activity to bind with the FcA region. There are presence of J chains in the dimeric IgA which help in this binding. One dimeric IgA molecule is capable of binding with two FcaRI molecules.

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