BIOL 1107 Lecture Notes - Lecture 26: Mhc Class Ii, Antigen Presentation, Immunoglobulin A

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10 Jul 2016
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Activated cytoxic t-cells can"t engulf bacteria, they send out a toxin to destroy bacteria instead. This is an external response (because they are not engulfing) and an adaptive immune response. Lycocytes are involved in the innate immune response. Lymphocytes are involved in the adaptive immune response. Both are activated in the spleen and lymph nodes. They are activated when they bind to an antigen. Inactive lymphocytes are mostly made up of nucleus, while activated have more mitochondria and er as well as a nucleus. Intestinal cells aka mucosal cells in epithelial tissue: malt. Thymus-dependent t cell recognizes / kills host cells infected with viruses. Immunocompatancy: receptor gives lymphocyte this, now it knows what to attack (what specific antigen) Igg: most abundant, fights against bacteria, virus, toxins. Iga: breast milk, immunizes babies, tears, saliva, mucus. T-cells become activated by exposure to another lymphocyte, not just by an antigen. Tcr binding site: deactivates virus by binding.

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