PHYSL402 Lecture Notes - Lecture 13: Starling Equation, Extracellular Fluid, Osmosis

• School: University of Alberta
• Department: Physiology
• Course: PHYSL402
• Professor: Dr.shamza

Document Summary

Balance of hydrostatic and colloid osmotic pressures = starling forces. Osmotic effect of electrolytes across the cell membrane. Osmosis: movement of high [ ] water to low [ ] water. Cell membranes relatively impermeable to solutes, highly permeable to water. High solute on one side of membrane, water diffuses to area to high solute [ ] Rate of osmosis = rate of water diffusion: and 2) = image above. Cell membrane exposed to pure water and osmolarity of icf is 282mosm/l potential osmotic p: 5400mmhg! **small changes in [ ] of impermeant solutes in. Ecf can cause large changes in cell v. Osmotic p = pressure generated against the plasma membrane to prevent free water flow absorb, 80% total osmolarity of body fluids due to: Whole body equilibrium: drink, filter, reabsorb back into blood. Volume nad osmolarity of ecf and icf in pathophysiology.