The functions of the major histocompatibility complex (MHC) and CD1 molecules are alike because both do what? A) Are antigen-presenting molecules B) Bind antigens to antibodies C) Secrete interleukins during the immune process D) Are capable of activating cytotoxic T lymphocytes
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1. major histocompatibility complex are... a- antigens that cause an allergic response b - antigens attached to foreign invaders c - not really antigens, rather antibodies produced to mask foreign invaders d - glycoproteins found on surface of almost all cells in body that help immune system distinguish self vs. nonself e - necessary for presenting foreign antigens to b cells 3. Class II MHC molecules are found on the surface of a- all cells except red blood cells b - only B cells c - only macrophage d - only T cells e - all antigen presenting cells 2. Which of the following attributes of the acquired immune system is MOST important in allowing vaccination to be effective? a- it is based on circulating cells b - it allows for destruction of invading pathogens c - it involves the production of antibodies d - it has memory, responding more rapidly and stronger to subsequent exposure to antigen e- it is rapid
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What is the function of major histocompatibility class (MHC) I molecules? a. MHC I molecules assist with strengthening the cell membrane. b. MHC I molecules present antigens on the surface of a cell. c. MHC I molecules allow movement of materials across the cell membrane. d. MHC I molecules provide signals for processes involved in cell division
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1. Macrophages display antigen on an MHC class II complex. What is the direct consequence of this display? Recognition by CD8+ cytotoxic T-cells resulting in destruction of virally infected cells Increased opsonization by binding to IgA Recognition by other macrophages resulting in increased phagocytosis Recognition by CD4+ helper T-cells resulting in activation of B-cells 2. MHC II molecules are used for: antigen presentation on body cells antigen digestion antibody production antigen presentation on macrophages 3. What is the primary mechanism by which Natural Killer cells recognize cancerous or virally infected cells? Viral budding MHC class II expression Less MHC and more activators More MHC and less activators
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