BIOL 084 Chapter Notes - Chapter 17: Cross-Matching, Retrovirus, Anaphylaxis
15 Oct 2016
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Barrier that prevents pathogens from entering body. Cilia sweep out mucus and trapped microbes. Stomach acid kills germs that enter through nose and mouth. Inflammatory response: characterized by swelling, redness, soreness, and increased warmth increases blood supply. Histamine: triggers vasodilation (enlargement of blood vessels) Macrophages: white blood cell that extend pseudopods and engulfs microbes. Interferons: chemicals are released by immune system to block against viral infections. Consists of lymphocytes; found in bone marrow; recognize antigens (germs) B lymphocytes: produce antibodies against specific antigens in humoral response. T lymphocytes: fight pathogens;hand-to-hand combat in cell-mediated response. Can bind to particular antigens fundamental mechanism in development of immunity lymphocyte, once active, can clone itself and differentiate into plasma cells and memory cells. Plasma cells: fight antigens immediately in primary immune response; do not live long. Memory cells: remain circulating in blood in small numbers for a life time immunological memory: prevents you from getting any specific viral infection more than once.
