physio

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Author:
sweetlu
ID:
102467
Filename:
physio
Updated:
2011-12-08 11:39:45
Tags:
physio
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Description:
physio
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  1. rate of diffusion formula (Jx)
    • Jx= Px A (C1-C2)
    • permeability coef x surface area x driving force
  2. total body water
    • TBW= 60% body weight
    • ECV= 40% TBW
    • ICV= 60% TBW
  3. Measuring TBW
    H2O or antipyrine injection

    V(TBW)= (V(antipyrine) x C (antipyrine)) / C (TBW)
  4. measuring ECFV
    inulin or mannitol

    **mannitol can also pull H2O out of brain tissue, lowering intracranial pressure**
  5. measuring PV
    albumin 125 or Evans blue dye
  6. osmotic reflection coeffecient
    • 1= not permeable
    • 0= freely permeable
  7. sympathetic postganglionic fibers that release ACh
    - fibers to sweat glands and some blood vessels in skin and SkM (which cause vasodilation instead of constriction)

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