BIO 102 Lecture Notes - Lecture 19: Microorganism, Viral Disease, B Cell
23 Aug 2016
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Microbes: microscopic living organisms like bacteria, protists, and fungi that live in water, soil, or animal bodies that do not harm. Pathogens: microbes that cause disease, most microbial diseases have been with humans for thousands of years (chicken pox, measles) New diseases are emerging and are more deadly strains of familiar pathogens. Viruses that have emerged as serious threats to human health: hiv, ebola virus, west nile virus, sars, swine flu, bird flu, e. coli, normally harmless but can cause food poisoning. Mucous membranes of digestive, respiratory, and urogenital tracts: inflammatory response causes tissues to become warm, red, swollen, and painful; functions h. i. Attracts phagocytes to infected or injured tissue h. ii. White blood cells engulf foreign particles and destroy body"s own cells if d. ii. infected by viruses. Inflammatory response recruits leukocytes to the site of the wound and walls off the injured area which isolates infected tissue from the rest of the body d. iii.
