Biology 1202B Chapter Notes -Adaptive Immune System, T Cell, Immunity (Medical)
24 Apr 2013
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Most are macromolecules: large proteins (glycoproteins & lipoproteins) or polysaccharides (lipopolysaccharides, can be nucleic acid or synthesized molecules. Antigens are recognized by two types of lymphocytes. B lymphocytes (b cells: differentiate from stem cells in the bone marrow, after they differentiate, they are released into the blood & carried to capillary beds serving the tissue & organs of the lymphatic system. T lymphocytes (t cells: produced by the division of stem cells in the bone marrow, released into the blood & carried to the thymus (an organ of the lymphatic system) where they differentiate. Leukocytes (wbc) in mice were killed by irradiation: mice couldn"t develop an adaptive immune response. Injecting lymphocytes from normal mice into these irradiated mice restored the adaptive immune response. Antibody mediated immunity (ami) or humoral immunity: antibody is a protein produced by the body in adaptive immunity to destroy or neutralize an antigen. Lymphocyte divide to produce a large number of clones.
