bio lect exam ii

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meotin626
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46568
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bio lect exam ii
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2010-11-01 18:19:46
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bio lect exam ii
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  1. enviro heat transfer
    Conduction
    direct transfer of thermal energy
  2. enviro heat transfer
    Convection
    thermal energy absorbed by medium
  3. enviro heat transfer
    heat if evaporation
    evap water absorbs energy
  4. Homeostasis & Thermoregulation
    • Body Internal Enivroment
    • A Dynamic constancy
  5. Homeostasis & Thermoregulation
    the whole is greater than the sum of its parts
  6. Homeostasis
    maintaining a constant, optimal internal enviro
  7. why is Homeostasis so important?
    Proteins
    -Including enzymes and other molecular machines that runs everything
  8. why is Homeostasis so important?
    Proteins
    • are very sensitive to deviation in conditions
    • -esp. temp & pH
    • -change protein shape => /fx
  9. Conformers & Regulators
    Conformers
    allow internal enviro to conform to external
  10. Conformers & Regulators
    Regulators
    use control mechanism to maintain constant internal enviro desipte external variation
  11. Conformers & Regulators
    NOTE
    • an organism may be different for different variables
    • (same fish may B thermoconformer & Osmoregulator)
  12. Conformers vs Homestasis?
    How can thay B Homestsic & conforming?
    • live in a stable enviro
    • (@ least w/ respect to conformed variable)
    • &/ or
  13. Conformers vs Homestasis?
    How can thay B Homestsic & conforming?
    • be able to make new versin of proteins for esh variation
    • -require larger genome
    • -trnsition to new enviro must B gradual to allow sufficient expression of new proteins

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