BIOL 1080 Lecture Notes - Lecture 10: Insulin Resistance, Natural Killer Cell, Skeletal Muscle

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Nonspecific defenses: physical barriers and chemical barriers (skin). If pathogen surpasses that, nonspecific chemical intercellular attempt to remove the pathogen. Specific defenses: immune system, with specificity, when others don"t work. Although nonspecific defense is said not to adapt, it is still able to know what a healthy bacteria is. Defensive cells : phagocytic ( engulfs the cell), eosinophils ( kills parasites) , natural killer. Defensive proteins : interferons ( slow the spread of the virus in the body), complement. System ( stimulates histamine release, increases inflammation, kills bacteria while promoting phagocytic) Inflammation : widening of blood vessels and increased permeability of capillaries, results in swelling, pain, redness and heat brings in defensive cells and speed healing. Fever : unusually high temperature - slows bacteria, while speeding up the body"s immune system. Slide 5 : process of protein based defense. Complement system perforates the bacteria, the bacteria cannot contain a stable environment, water enters the cells, and bacteria bursts.

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