Tissue transplants should have matching ____ to prevent rejection in the host. a. MHC molecules b. blood types c. interleukins d. All of the choices are correct.
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Which of the following increases the likelihood of successful organ transplant? a. matching the ABO blood group antigens b. matching the MHC tissue antigens c. administration of immunosuppressive drugs d. all of these choices
Class II MHC genes code for Multiple Choice certain secreted complement components. self receptors recognized by natural killer cells. all HLA antigens. receptors located primarily on macrophages, dendritic cells, and B cells. All of these choices are correct.
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T cells are stimulated by the binding of antigen-MHC complex to the T cells' receptors. The outcome of this interaction (i.e., whether it leads to formation of antibodies or to the death of the cell with the antigen-MHC complex) depends on a. which class of MHC protein is involved. b. which type of T cell is involved. c. whether perforin is produced. d. All of the above e. None of the above Which immune protein(s) below is/are correctly described? Select all that apply: a. Antibodies: bind to specific epitopes, or molecular patterns, present on antigens. Antibodies comprise the B cell receptor. Secreted antibodies produced by plasma cells enable opsonization and agglutination b. Major histocompatibility complex (MHC): MHC II is present on professional antigen presenting cells (APCs) and present antigens to the T cell receptor (TCR) of T helper cells. MHC I is present on most nucleated cells and can present self-antigens as well as internal pathogen antigens to the T cell receptor. c. T cell receptor (TCR): membrane receptors on T cells that enable these lymphocytes to bind to epitopes presented by MHC molecules. Involved in the activation of T cells. d. Complement: innate immune system protein. Cascade of activation that enables the binding to invading microorganisms and promotes opsonization (phagocytosis) by phagocytic cells. e. Cytokines: small signaling proteins produced by various cell types. Involved in the activation and proliferation of B and T lymphocytes
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