The Cells that help regulate the immune response are associated to A) major histocompatibility complex (MHC) molecules. B) cytotoxic T (Tc) cells. C) CD8 cells. D) helper T (TH) cells. E) all are correct F) none is correct The reason to my answer is; Amoratatingahata from underworld wants to give a kidney to her older sister. What type of organ transplant will this be? A) allograft B) isograftC) autograglh The reason to my answer is; D) xenograftE all are correct 23) The five basic classes of antibodies are; A) IgA, IgD, IgK, IgG, and IgM B) IgA, IgD, IgE, IgF, and IgK C) IgA, IgB, IgC, IgD, and IgE D) IgA, IgB, IgJ, IgL, and IgM E) All are correct F) None is correct, I cannot be fooled. The reason to my answer is; 24) AIDS, these cells decrease dramatically in number; During the final phase of HIV-1 infection, when a person is said to have A) memory B cells E) brain cells B) B cells E) lungs cells C) plasma cells F) all are correct D) liver cells G) none is correct

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