BMS291 Lecture Notes - Lecture 6: Pulmonary Edema, Cerebral Edema, Oncotic Pressure
Document Summary
Normally there is a high level of proteins in the plasma. The pressure against which fluid moves out of the capillaries due to the existance of fluid already occupying the space. The pressure against which fluid moves out of the capillaries due to the existence of protiens in the intersitial space. Most proteins are within cells not outside them in the intersitial space so this pressure is lower than that of the capillaries. Water movement between interstitial fluid and intracellular fluid. Water tends to move between spaces based on maintaining equilibrium of concentrations. Water moves through osmosis from interstitial fluid to within the cell. Most proteins are within cells, not in the interstitial fluid. Sodium concentration is normally highest outside the cell. Potassium concentration is normally highest inside the cell. If total body water too low, fluid moves out of cells into plasma. Maintains plasma volume (heart needs volume to pump)
