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Would pneumococcal pneumonia require a TH cell to stimulate a B cell to form antibodies?
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- Delayed-type hypersensitivity reactions in the skina) are characterized by a wheal and flare reaction.b) peak at 4 to 6 hours after exposure to antigen.c) require complement activation.d) show induration because of the influx of sensitized T cells and macrophages.e) depend on activities of the Fc portion of antibodies.What is the monoclonal surface membrane immunoglobulin for b cell with burkitt's lymphoma?Describe a mechanism by which an antigen can enter the lymph node and make contact with the B-cell receptor.
- Match the major types of antibodies with theirfunction and/or where each is found.(1) associated with allergic reactions(2) important in B cell activation, onsurfaces of most B cells(3) activates complement, anti-A andanti-B in blood(4) effective against bacteria, viruses,and toxins in plasma and tissue fluids(5) found in exocrine secretions,including breast milkA. IgAB. IgMC. IgGD. IgDE. IgEwhich type of immunity reacts to tuberculosis, cell mediated or humoral? why?Pus is both a sign of infection and an indicator ofimmune defenses in action. Explain.
- A ‘B’ lymphocyte demonstrates ‘B cell receptors’ on its surface. These receptors have ‘variable’ regions which match the variable regions of the antibodies released by the plasma cell (formed by the activated B lymphocyte). Which of the following types of antibodies forms these ‘B cell receptors’ ? IgG IgA IgD IgEExplain why IgM has a stronger power of agglutination than antibodies of any other class.. A) What is the significance of producing monoclonal antibodies? B) What is the role of cell culture in production of monoclonal antibodies? C) Name and briefly explain the use of any 4 commercially available monoclonal antibodies.
- What is the immunity of agranulocytes?Describe the requirements for activation of helper T cells by macrophages. Explain how helper T cells promote the immunological defenses provided by cytotoxic T cells and by B cells.Would the primary response or the secondary response be more affected by a lack of memory B cells for a particular antigen?