During an experiment, the following data were obtained form

Discussion in 'USMLE Step 2 CK' started by Guest, Jun 13, 2009.

  1. Guest

    Guest Guest

    During an experiment, the following data were obtained form an anesthetized dog:

    Mean Glomerular capillary hydrostatic 45 mm Hg
    pressure (HP oc )

    Mean Bowman space hydrostatic pressure 12mm Hg
    (HP es)

    Mean glomerular capillary oncotic pressure 23mm Hg
    (n oc)

    Mean Bowman space oncotic pressure 0mm Hg
    (N es)

    Coefficient of filtration (K) 3.0 (Ml/min/mm Hg

    Renal blood flow 200 ml/min
    Hematocrit 40%

    Which of the following best represents the glomerular filtration rate (in mL/min) in this animal?
    A) 30
    B) 60
    C)90
    D) 120
    E)180
  2. Guest

    Guest Guest

    The answer is A---30.
    GFR=K(Pgc-Pbc)-(pgc-pbc)
    GFR=3(45-12)-(23-0)
    GFR=3x10
    GFR=30

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