PHGY 209 Lecture Notes - Lecture 7: Starling Equation, Blood Proteins, Hydrostatics
14 Nov 2016
School
Department
Course
Professor
Document Summary
), or oncotic pressure: due to plasma proteins. Determines how much water flows into/out of capillaries. Two major forms of fluid transport across capillary wall: Filtration: tends to push out fluid from inside the capillaries. Note that bulk flow is the flow of molecules due to hydrostatic pressure difference. Bulk flow across a porous membrane (a sieve withholding some particles). Osmotic flow: tends to pull in , or retain fluid, inside capillaries. Due to cop filtration and osmotic flow are starling forces. Cop increase => more water flows into plasma. Cop decrease => more water flows into isf. Capillary bed: where exchange b/w plasma and isf happens. 120hg/80 is the normal blood pressure that heart generates as it contracts o. Note: arterial side bp = 35mmhg; venous side bp = Net filtration pressure arterial side = 10mmhg o. Venous side = 10mmhg exchanges take place along entire length of capillaries, not just at the two ends (venous and distal).
