fluid shift across capillary wall Flashcards
what acts as the go between blood and body cells
interstitial fluid
what are capillaries
single layer of endothelial cells
what do capillaries allow
Allow rapid exchange of gases, water & solutes with Interstitial Fluid
delivery of nutrients and O2 to the cells
removal of metabolites from cells
what does blood flow to capillaries depend on
contractile state of arterioles
what regulates flow in CB
precapillary sphincters
ficks law
The amount of gas that moves across a sheet of tissue in unit time is proportional to the area of
the sheet but inversely proportional to its thickness
what can go through the endothelial cells
lipid soluble molecules
what is NFP
(Pc + (pi)i) - ((pi)C + Pi)
what is NFP at the arteriolar end
10 mmHg - filtration
what is NFP at the venule end
-8mmHg - absorption
what are the 2 forces favouring filtration
capillary hydrostatic pressure and interstitial fluid osmotic pressure
what are the 2 forces favouring absorption
capillary osmotic pressure and interstitial fluid hydrostatic pressure
what happens to excess fluid
returned to circulation via lymphatics
oedema
accumulation of fluid in the interstitial space
HF on frank starling curve
shift right
