Fluid Shift Flashcards
What does interstitial act as a go-between?
Blood and body cells
What are capillaries made up of?
A single layer of endothelial cells
Capillaries allow exchange of gas, water and solute between what?
Blood and interstitial fluid
What is the relative speed of blood flow through capillaries and why?
Slow- to allow time for gas exchange
In general, can plasma proteins cross the capillary wall?
No
What can pass through the endothelial cells of capillaries and what can pass through the pores?
Endothelial cells- lipid soluble substances
Pores- water soluble substances
How are some proteins moved across the capillary wall?
Vesicular transport
Fluid movement follows what kind of gradient?
Pressure
Transcapillary fluid flow is passively driven by what?
Pressure gradients across the capillary wall
Net filtration pressure is proportional to what?
Forces favouring filtration - forces opposing filtration
What are two forces which favour filtration?
Capillary hydrostatic pressure and interstitial fluid osmotic pressure
What are two forces which oppose filtration?
Capillary osmotic pressure and interstitial fluid hydrostatic pressure
Starling forces favour filtration where?
Arteriolar end
Starling forces oppose filtration where?
Venular end
Excess fluid is returned to the circulation how?
Via the lymphatic system as lymph
