BIOL273 Study Guide - Quiz Guide: Immune System, Membrane Protein, Immunodeficiency

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6. 1 function of the immune system and types of pathogens. Big multi cellular organisms provide lots of environments for other smaller organisms. Immunity ability for body to fight off invaders (immunis = exempt) Microbes, parasites, toxins (produced by microbes) other foreign proteins or substances (allergens) Removes dead/damaged tissues and cells scavenge extracellular compartments. Recognize and remove abnormal cells (uncontrolled growth) Enter body via a variety of routes. Surrounded by cell membrane and sometimes cell wall. Nucleic acid core with protein coat cannot reproduce alone. Hijack cell machinery, virus nucleic acid takes over. Some have envelope from host cell membrane. Cannot be treated with antibiotics, sometimes treated with antiviral drugs. New viral particles rupture host cell or bud off host cell. Immune system organs lymphoid organs (contain lymphocytes) Carry lymph extracellular fluid that has left capillaries (hydrostatic pressure) and filter through tissue. Conduit for immunologically active cells to travel through. Plasma (blood stream) extracellular fluid (tissue) lymph (lymphatic vessels)

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