FINAL FUCKING IMMUNO REVIEW
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Questions and Answers

What is the starter molecule for the classical complement pathway?

  • Factor H
  • C3
  • MBL
  • C1 (correct)
  • Which molecule acts as a decay accelerating factor in the alternative complement activation pathway?

  • MBL
  • Factor H and I (correct)
  • C3
  • Protectin (CD59)
  • Which pathway involves spontaneous activation and control by C1 inhibitor?

  • Classical complement pathway (correct)
  • Lectin complement pathway
  • Alternative complement pathway
  • None of the above
  • In the lectin complement pathway, what molecule serves as the starter molecule?

    <p>MBL</p> Signup and view all the answers

    Which complement molecule is known for preventing C9 from joining MAC?

    <p>Protectin (CD59)</p> Signup and view all the answers

    On which cells is Major Histocompatibility Complex (MHC) class I mainly found?

    <p>All nucleated cells</p> Signup and view all the answers

    Which of the following mediators causes vasodilation and increased permeability?

    <p>Prostaglandins</p> Signup and view all the answers

    What is the primary function of LTB4 among the leukotrienes?

    <p>Chemoattractant</p> Signup and view all the answers

    Which phase of the vascular stage of inflammation involves passive vasodilation and increased permeability?

    <p>Phase Three</p> Signup and view all the answers

    Which of the following inflammatory mediators is primarily responsible for inducing platelet aggregation?

    <p>Platelet Activating Factor</p> Signup and view all the answers

    Which of the following complement components is an exception to the rule that 'a' is the chemoattractant and 'b' is the active enzyme?

    <p>C2</p> Signup and view all the answers

    What is the primary function of IL-10, IL-4, and TGF-β in the resolution of inflammation?

    <p>Stimulating apoptosis of pro-inflammatory cells</p> Signup and view all the answers

    What is the role of a hapten in the immune response?

    <p>It can conjugate with a carrier to become immunogenic</p> Signup and view all the answers

    Which type of antigen is most likely to be presented by MHC class I molecules?

    <p>Viral antigens</p> Signup and view all the answers

    What is the difference between immunogenicity and antigenicity?

    <p>Immunogenicity is the ability to stimulate an immune response, while antigenicity is the ability to be caught by the outcome of that response</p> Signup and view all the answers

    Which type of antigen is most likely to be found in gram-negative bacteria?

    <p>F-fimbria antigens</p> Signup and view all the answers

    What is the role of an epitope in the immune response?

    <p>It is a determinant on the surface of an antigen that can be bound by the immune system</p> Signup and view all the answers

    What are autoantigens?

    <p>Self antigens that the immune system recognizes as non-self</p> Signup and view all the answers

    Which type of graft involves transplanting tissues between genetically identical individuals?

    <p>Isograft</p> Signup and view all the answers

    Which type of graft rejection causes the strongest immune rejection reaction?

    <p>Xenograft rejection</p> Signup and view all the answers

    Which type of rejection is characterized by proliferation of intimal smooth muscle cells leading to arterial occlusion?

    <p>Chronic rejection</p> Signup and view all the answers

    Which type of graft involves transfer of circulating blood cells or plasma?

    <p>Transfusion</p> Signup and view all the answers

    Which type of graft involves moving host tissues to a different part of the animal's own body?

    <p>Autograft</p> Signup and view all the answers

    Which strategy involves the use of drugs that block T cell costimulation?

    <p>Costimulatory blockade</p> Signup and view all the answers

    What is the primary function of conventional DCs?

    <p>Found at sites of pathogen entry and express co-stimulators</p> Signup and view all the answers

    What is the main difference between T independent and T dependent antigens?

    <p>T independent antigens directly stimulate B cells</p> Signup and view all the answers

    Which cytokine is released by leukocytes and has 39 discovered types?

    <p>Interleukins</p> Signup and view all the answers

    What is the role of Fc receptors on B cells?

    <p>Detect IgG, IgE, and IgA</p> Signup and view all the answers

    Which type of B cell activation results in long-lived plasma cells and isotype switching?

    <p>T dependent activation</p> Signup and view all the answers

    What is the primary function of helper T cells?

    <p>Provide support to B cells and CD8 killer T cells</p> Signup and view all the answers

    Which cytokine is mainly responsible for the activation of CD8 killer T cells?

    <p>IL-12</p> Signup and view all the answers

    What is the main function of IgG antibodies?

    <p>Neutralize, opsonize, activate ADCC, and activate complement</p> Signup and view all the answers

    What is the primary function of NK cells?

    <p>Kill infected cells through ADCC</p> Signup and view all the answers

    Which type of antigen presentation is mainly responsible for the activation of CD8 killer T cells?

    <p>Cross presentation on MHC1</p> Signup and view all the answers

    What is the main cause of autoimmunity?

    <p>Spontaneous development of reactivity against the self</p> Signup and view all the answers

    Which process involves immature self-reactive T cells occurring in primary lymphoid organs?

    <p>Receptor editing</p> Signup and view all the answers

    In type 1 hypersensitivity, where does excessive histamine release primarily occur in dogs?

    <p>Liver</p> Signup and view all the answers

    Which type of hypersensitivity reaction involves antibody-antigen complex deposition in vessels?

    <p>Type 3</p> Signup and view all the answers

    What is the outcome of a self-reactive T cell in B cell immunotolerance with high avidity to self?

    <p>Apoptosis</p> Signup and view all the answers

    Which pathway of cell death involves BAX & BAK puncturing mitochondria?

    <p>Intrinsic pathway</p> Signup and view all the answers

    What is the primary function of vasoactive amines like histamine and serotonin in inflammation?

    <p>Increasing blood vessel permeability</p> Signup and view all the answers

    Which stage of inflammation is characterized by passive vasodilation that leads to swelling, pain, and impaired function?

    <p>Vascular Stage Phase Three</p> Signup and view all the answers

    What is the main effect of platelet activating factor (PAF) in inflammation?

    <p>Induction of platelet aggregation</p> Signup and view all the answers

    Which molecules play a key role in the process of leukocyte extravasation during inflammation?

    <p>Selectins, mucins, integrins, and PECAM-1</p> Signup and view all the answers

    Which molecule is responsible for the termination of inflammation by inducing apoptosis in pro-inflammatory cells?

    <p>Lipoxins</p> Signup and view all the answers

    What is the function of complement component C2 in the complement system?

    <p>Chemoattractant activity</p> Signup and view all the answers

    In a xenograft transplant, what type of antigens are involved, causing the strongest immune rejection reaction?

    <p>Xenoantigens</p> Signup and view all the answers

    What is the primary cause of arterial occlusion in chronic rejection after several months post-transplant?

    <p>Proliferation of intimal smooth muscle cells</p> Signup and view all the answers

    Which strategy involves inhibiting T cell signaling to prevent excess IL-2 and T cell proliferation?

    <p>Cyclosporine</p> Signup and view all the answers

    What type of graft involves moving host tissues to a different part of the animal's body, triggering no immune response?

    <p>Autograft</p> Signup and view all the answers

    What is the main role of passive vaccines in providing immediate protection?

    <p>Generating antibodies in the recipient</p> Signup and view all the answers

    Which molecule is involved in the hyperacute rejection that occurs minutes to hours after grafting?

    <p>Pre-existing antibodies</p> Signup and view all the answers

    Which type of B cell activation results in rapid IgM production, short-lived plasma cells, and no memory formation?

    <p>T-independent activation</p> Signup and view all the answers

    Which cytokine is responsible for the differentiation of Th1 cells and the production of interferon-gamma (IFN-y)?

    <p>IL-12</p> Signup and view all the answers

    Which type of T cell activation requires the presence of helper T cells to stimulate B cells, leading to isotype switching and affinity maturation?

    <p>Follicular B cell activation</p> Signup and view all the answers

    Which cytokine is mainly responsible for activating CD8 killer T cells through cross-presentation on MHC-I molecules?

    <p>IFN-gamma</p> Signup and view all the answers

    What is the main function of Th17 cells in the adaptive immune response?

    <p>Release of IL-17 for inflammatory responses</p> Signup and view all the answers

    Which type of B cell receptor has heavy chains that determine the class of immunoglobulin (Ig) and light chains that make up the other half of the binding site?

    <p>BCR (B cell receptor)</p> Signup and view all the answers

    In the pathway of T-dependent B cell activation, what is the main role of germinal centers?

    <p>Somatic hypermutation and affinity maturation</p> Signup and view all the answers

    Which complement molecule acts as a decay accelerating factor in the alternative complement activation pathway?

    <p>Factor H</p> Signup and view all the answers

    Which MHC molecule is found on all nucleated cells and can present antigens to CD8 T cells?

    <p>MHC class I</p> Signup and view all the answers

    Which of the following complement components is an exception to the rule that 'a' is the chemoattractant and 'b' is the active enzyme?

    <p>C3</p> Signup and view all the answers

    Which complement pathway involves spontaneous activation and control by C1 inhibitor?

    <p>Alternative</p> Signup and view all the answers

    What is the main function of IgG antibodies?

    <p>Activation of complement</p> Signup and view all the answers

    What is the role of Fc receptors on B cells?

    <p>Antibody-mediated phagocytosis</p> Signup and view all the answers

    What is the primary function of vasodilatory prostaglandin E1 (PGE1)?

    <p>Relieve pain</p> Signup and view all the answers

    Which vasoactive amine is particularly known for causing dilation of blood vessels and increased permeability?

    <p>Histamine</p> Signup and view all the answers

    In the context of inflammation stages, which phase is characterized by active vasodilation to increase blood flow, resulting in redness and heat?

    <p>Vascular Stage Phase Two</p> Signup and view all the answers

    What is the main function of plasma proteases in the inflammatory process?

    <p>Increase permeability and pain</p> Signup and view all the answers

    Which mediator of inflammation is responsible for inducing smooth muscle contraction and acting as a chemoattractant?

    <p>Leukotriene B4</p> Signup and view all the answers

    What is the outcome of failing to resolve inflammation properly?

    <p>Chronic inflammation</p> Signup and view all the answers

    Which molecule serves as the starter molecule in the alternative complement activation pathway?

    <p>C3</p> Signup and view all the answers

    Which type of cells display Major Histocompatibility Complex (MHC) class I molecules to CD8 T cells?

    <p>DC cells</p> Signup and view all the answers

    Which type of hypersensitivity reaction involves T cell mediation and does not involve B cells or antibodies?

    <p>Type 4</p> Signup and view all the answers

    What is the primary function of Decay Accelerating Factor in the complement system?

    <p>Prevents C9 from joining MAC</p> Signup and view all the answers

    What is the primary cause of autoimmunity as described in the text?

    <p>Loss of regulatory control</p> Signup and view all the answers

    Which antigen is likely involved in a positive skin test result that shows huge mixed cell swelling?

    <p>Mycobacteria tuberculosis</p> Signup and view all the answers

    Which complement pathway involves mannose binding lectin (MBL) as a starter molecule?

    <p>Lectin Complement</p> Signup and view all the answers

    What triggers heart disease as mentioned in the text?

    <p>Streptococcus infection</p> Signup and view all the answers

    What is the outcome of the Major Histocompatibility Complex (MHC) class II binding specificity compared to MHC class I?

    <p>Displayable by DC cells</p> Signup and view all the answers

    What is the function of Protectin (CD59) in the complement system?

    <p>Prevents C9 from joining MAC</p> Signup and view all the answers

    Which factor plays a big role in autoimmunity according to the text?

    <p>MHC (Major Histocompatibility Complex)</p> Signup and view all the answers

    Which type of antigen is most likely to be found in gram-negative bacteria?

    <p>K- capsular antigens</p> Signup and view all the answers

    Which molecule acts as a decay accelerating factor in the alternative complement activation pathway?

    <p>Factor H</p> Signup and view all the answers

    Which cytokine is responsible for the differentiation of Th1 cells and the production of interferon-gamma (IFN-γ)?

    <p>IL-12</p> Signup and view all the answers

    What is the main difference between T independent and T dependent antigens?

    <p>T independent antigens do not require helper T cells for the activation of B cells</p> Signup and view all the answers

    Which MHC molecule is found on all nucleated cells and can present antigens to CD8 T cells?

    <p>MHC class I</p> Signup and view all the answers

    Which molecule is responsible for the termination of inflammation by inducing apoptosis in pro-inflammatory cells?

    <p>TGF-β</p> Signup and view all the answers

    Which type of immune cell is responsible for presenting antigens to naive T cells?

    <p>Dendritic Cells</p> Signup and view all the answers

    Which type of innate immune cell functions as a professional antigen-presenting cell?

    <p>Dendritic Cells</p> Signup and view all the answers

    In which organ do B cells mature and undergo positive and negative selection in rabbits, ruminants, dogs, and pigs?

    <p>Ileal Peyer's Patches</p> Signup and view all the answers

    Which type of immune cell is primarily responsible for killing virally infected cells and tumor cells?

    <p>NK Cells</p> Signup and view all the answers

    Which type of immune cell is responsible for activating helper T cells through the presentation of antigens on MHC class II molecules?

    <p>Type 2 cDCs</p> Signup and view all the answers

    Which type of immune cell is responsible for cross-priming antigens onto MHC class I molecules to activate naive killer T cells?

    <p>Type 1 cDCs</p> Signup and view all the answers

    Which type of immune cell primarily releases pro-inflammatory cytokines in response to bacterial infection?

    <p>Macrophages</p> Signup and view all the answers

    Which type of immune cell is responsible for the production of type I interferon during viral infections?

    <p>Plasmacytoid DCs</p> Signup and view all the answers

    Which immune cell receptor is responsible for recognizing carbohydrates of fungi?

    <p>C-type Lectin Receptor</p> Signup and view all the answers

    Which immune cell receptor is responsible for recognizing bacterial peptidoglycans?

    <p>NOD-like Receptor</p> Signup and view all the answers

    What is the term used to describe tissues placed at a different site?

    <p>Heterotopic</p> Signup and view all the answers

    Which type of graft involves transplanting tissues between genetically different members of the same species?

    <p>Homograft</p> Signup and view all the answers

    What is the most frequent type of graft becoming routine for kidneys and bone marrow?

    <p>Allograft</p> Signup and view all the answers

    What is the result of the adaptive immune response that creates memory and leads to accelerated rejection upon re-grafting from the same donor?

    <p>Graft rejection</p> Signup and view all the answers

    What causes arterial occlusion due to the proliferation of intimal smooth muscle cells in chronic rejection?

    <p>Thrombotic occlusion of blood vessels</p> Signup and view all the answers

    What is the primary outcome of a self-reactive T cell in central immunotolerance?

    <p>Apoptosis</p> Signup and view all the answers

    Which type of hypersensitivity involves the destruction of red blood cells (RBCs)?

    <p>Type 2</p> Signup and view all the answers

    What is the process by which self-reactive T cells are eliminated in central immunotolerance?

    <p>Negative selection</p> Signup and view all the answers

    Which type of immune cell is responsible for cross-presenting antigens on MHC class I molecules?

    <p>Dendritic cells</p> Signup and view all the answers

    YOU GOT THIS

    <p>ALL THE FUCKING ABOVE</p> Signup and view all the answers

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