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Unformatted text preview: (pT). pC is much greater than pT, therefore the oncotic pressure gradient across the capillary, if unopposed by hydrostatic forces, would reabsorb fluid from the interstitium into the capillary. The oncotic pressure difference (pC - pT) should be multiplied by the reflection coefficient that represents the permeability of the capillary barrier to the proteins responsible for generating the oncotic pressure. Because both hydrostatic and oncotic forces are normally expressed in units of mmHg. The net driving force (NDF) for fluid movement is 4 Pulmonary Circulation the net pressure gradient determined by the sum of the individual hydrostatic and oncotic pressures. For a given NDF, the amount of fluid filtered or reabsorbed per unit time (fluid flux, or JV) will be determined by the permeability of the capillary barrier and by the surface area available for exchange. The permeability is usually referred to as the filtration constant (KF), and is determined by the physical properties of the barrier (i....
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This note was uploaded on 04/18/2008 for the course PHYS 1010 taught by Professor Thompson during the Fall '07 term at New York Medical College.
- Fall '07
- Hydrostatic Pressure