Hypersensitivity MC Questions Fully Solved .

The b chain of the FceRI: A Binds IgE. B Is associated with Lyn. C Contains a GPI-anchor. D Possesses an ITIM sequence. E Is also used by FceRII. - correct answer B Is associated with Lyn. Which one of the following mast cell products is not preformed and therefore has to be newly synthesized?: A Histamine. B Prostaglandin D2. C Heparin. D Neutral protease. E Eosinophil chemotactic factor (ECF). - correct answer B Prostaglandin D2. Lol p1-11V are allergens cloned from: A Rye grass pollen. B House dust mite. C House dust mite feces. D Animal danders. E Dermatophagoides pteryonyssinus. - correct answer A Rye grass pollen. Type I hypersensitivity can be blocked using: A Histamine. B An IgA myeloma. C A myeloma protein of mixed antibody class. D Sodium cromoglycate. E Interleukin-5. - correct answer D Sodium cromoglycate. A major unresolved question concerning ADCC is: A Whether antibody is involved. B Whether it can be carried out by NK cells. C Whether it leads to cell death. D Whether it is complement-dependent. E To what extent it occurs in vivo. - correct answer E To what extent it occurs in vivo. Mycoplasma pneumoniae infection can lead to: A Hashimoto's thyroiditis. B Agranulocytosis. C Cold hemagglutinin disease. D Thrombocytopenic purpura. E Neonatal alloimmune thrombocytopenia. - correct answer C Cold hemagglutinin disease. The term reactive lysis usually refers to a sequence of events involving: A Natural killer (NK) cells.