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mianyi1（mianyi1） Medical immunology simulation examination questions (1) Type [A1 questions] The following questions are listed below: A, B, C, D, and E 5 alternative answers, please choose the best answer from them. The corresponding letter on the answer sheet and the corresponding number of the root. 1., the experimental animals were removed from the thymus after neonatal thymectomy A. deep cortical areas lack T cells B. germinal center formation is affected The number of T cells and the germinal center of C. were unaffected in thymus dependent region D. deep cortical areas lack T cells, while germinal center formation is also affected There was no significant effect on the superficial cortical areas of E. 2., immunity to the organism A. advantage B. harmful C. is both good and harmful D. is harmless E. is advantageous in normal circumstances and harmful under certain conditions 3.IgM A.IgM has hinge regions in its molecular structure B. natural blood type antibody is IgM The hemolysis of C.IgG is stronger than that of IgM D. is synthesized late in ontogeny E. in serum IgM consists of 4 monomers passing through a chain into a four dimer 4.IgG A.IgG exists in the form of monomers and is widely distributed in body fluids B.IgG4 has the strongest capacity for fixed complement C.IgG has a relatively short half-life D. is a natural blood group antibody E. was not involved in the ADCC reaction 5. when the parasite is infected, the apparently elevated level of Ig is A.IgG B.IgA C.IgM D.IgD E.IgE 6. complement A. has the corresponding receptor B. has an anti infection effect C. classical pathway components include C1 - 9 D. humoral complement inhibitors include H factor E. or more are correct 7. the components of the classical complement pathway include A.C1q B.IgG1 C.IL - 2 D.H factor E.B factor 8. what has the effect of allergic toxin is A.G5a B.C1q C.C3 D.I factor E.H factor 9. has the function of conditioning is A. antigen B. antigen and complement C. antibodies and c