Lectures 19 and 20 Flashcards
what are the four primary forces driving fluid exchange?
- capillary hydrostatic pressure
- interstitial fluid colloid osmotic pressure (oncotic pressure)
- interstitial fluid hydrostatic pressure
- capillary colloid osmotic pressure (oncotic pressure)
the balance of the four primary forces determines ____ filtration pressure
net
tends to force fluid outward through the capillary membrane
capillary hydrostatic pressure
causes osmosis out of capillary
interstitial fluid colloid osmotic pressure (oncotic pressure)
the osmotic pressure determined primarily by protein concentration
- interstitial fluid colloid osmotic pressure (oncotic pressure) and
- capillary colloid osmotic pressure (oncotic pressure)
normally, close to zero
interstitial fluid hydrostatic pressure
causes osmosis into capillary
capillary colloid osmotic pressure (oncotic pressure)
at arterial side of capillaries, net ________ is favored
filtration
at venous side of capillaries, net ________ is favored
reabsorption
the lymphatic system carries away any remaining fluid in the _______
interstitium
edema can occur if the rate of fluid that enters in the interstitium is ________ than what they lymphatic system can ________
greater; remove
every cause of edema can be related to:
the 4 forces driving fluid exchange
returns interstitial fluid back to circulation (2-3 L/day)
lymphatic system
proteins that leak out of capillaries are removed by ______________ and put back into circulation
interstitial space
this keeps interstitial colloid osmotic pressure low
what are some factors affecting lymph flow?
interstitial fluid pressure and activity of lymphatic pump
