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- That answer is incorrect. Type 1 immunity does not include parasites (those are type 2). T helper 2 cells (Th2) are also part of type 2 immunity as well as ICL2s, mast cells, eosinophils, basophils, IL-4, IL-5, IL-13, IgA, and IgE (IgG is found in both).T cells develop in the thymus. 90% of all thymocytes do not survive. They die due to apoptosis within the thymus as they may fail to make a productive T cell receptor and fail to survive the thymic selection. Thymocytes need to undergo two selection processes in the thymus. What are these selections? Explain why these processes are necessary.T cells andB cells. Put a check () mark in the table spaces below if the characteristic indicates the lymphocyte type. Put a cross (*) mark if III. otherwise. Characteristics T cell В сell Originates in the bone marrow May give rise to plasma cells Immunocompetence happens in bone marrow May give rise to memory cells Include regulatory, helper, and cytotoxic cells Responsible in directly attacking virus-infected cells Produces antibodies Effective against extracellular pathogens Immunocompetence happens in thymus gland Effective against intracellular pathogens Holds a surface meceptor capable of recognizing a specific antigen
- There are several important mechanisms for generating diversity in immunoglobulin and T cell receptors. Explain the similarities and differences in mechanisms that generates diversity in these receptors.True/False: Dendritic cells are tissue resident myeloid cells that are highly phagocytic, like macrophages. However, dendritic cells do not play a major role in large-scale pathogen destruction; instead, they are important in initiating adaptive immune responses of T cells.TLR-4 recognizes bacterial lipopolysaccharide in association with the host accessory proteins MD-2 and CD14. True/False: All mammalian TLRs have been shown to directly bind to microbial products, leading to TLR signaling.
- The selection process for T cells is more complex than B cells. Please explain the process, why it is more complex, and how/why autoreactive T cells are allowed to leave the thymus.may destroy infected cells. Select one: a. Phagocytic cells b. Natural killer T cells C. Cytotoxic T cells O d. Helper T cellsDiscuss the differences between humoral and cell mediated immunity in terms of chemicals and cells involved in each process as they tackle pathogens. (please do this on text as i cant read writing the best) and also in paragraphs and not a table if possible thank you!)
- The T lymphocytes as macrophages, secrete a number of polypeptides (cytokines) generally called lymphokines that serve as autocrine regulators of the immune system. Identify any five (5) lymphokines and explain their functions.Allergic reactions to penicillins are considered a/an hypersensitivity. T-cell-mediated antibody-mediated immunecomplex-mediated immediate Both T-cell-mediated and antibody-mediated are correct.Complement is an integral part of the innate immune response to bacteria . One of its mechanisms of action is to behave as an anaphylatoxin Describe the anaphylatoxic effects of complement identifying which components are activated.