Microbiology Human Flora + teeth test 3

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p.reilly1227
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82373
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Microbiology Human Flora + teeth test 3
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2011-04-28 09:35:29
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Microbiology Human Flora test three
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Microbiology Human Flora + teeth
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  1. What is fever caused by?
    Innate immune response to Pyrogens.
  2. A pyrogen is __?__.
    A substance that causes fever.
  3. The two types of pyrogens are __?__ and __?__.
    Endogenous and exogenous
  4. An endogenous pyrogen is __?__. Examples include __?__, __?__, and __?__.
    • Formed inside the body in response to an outside stimulant.
    • Interferons, TNF, IL-6
  5. An exongenous pyrogen is __?__. An example is __?__.
    • A pyrogen that originates from outside the body.
    • LPS
  6. The high temperature of a fever is caused by __?__.
    Vasoconstriction.
  7. Skin is difficult to colonize because it's __?__, __?__,__?__, and __?__.
    dry, salty, acidic, and has protective oils.
  8. The bacteria that do colonize the skin are mostly __?__.
    G (+) anaerobes
  9. __?__ commonly inhabits the naso and oropharynx and can be dangerous if __?__ or __?__ and form __?__.
    • G (+) anaerobes
    • they get into the blood stream or;
    • create plaques which cause gum disease
  10. __?__ is found in the stomach because it __?__ by __?__ where it can __?__.
    • Helicobacter pylori
    • survive in pH 1
    • burrowing into the protective mucous where it can;
    • cause ulcers
  11. Loss of acidity in the stomach, aka __?__, can be caused by __?__ which __?__.
    • achlorhydria
    • malnourishment
    • allows pathogens to grow
  12. The majority of human microflora are found in the __?__ where they __?__ and __?__.
    Intestine where they ferment digested food and provide nutrients and inhibit pathogens.
  13. The __?__ are sterile while __?__ contain __?__ bacteria.
    Kidney and bladder are sterile while the urethra and vagina contain G (+) cells and G (-) enterobacteriacea.
  14. The four structures of the tooth are __?__.
    
  15. The cause of a Carie is __?__.
    From the acidic byproducts of bacterial fermentation of sugars (lactic acid).
  16. Cariogenic bacteria include __?__ which converts __?__ and __?__
    Streptococcus mutans which converts sucrose to dextrin, S. epidermitis which forms a thick protective biofilm and Lactobaccilus acidophlius.
  17. Saliva plays what role in preventing caries?
    Acts as a buffer to keep mouth pH around 6.5-7.2. Rapid demineralization occures at pH 5.5.
  18. Plaque formations enhance formation of caries by __?__.
    trapping sugars for bacterial fermentation which lowers pH. They also provide an anaerobic enviornment for bacteria to live in.

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