ch 20 pt 5 Flashcards
What is diffusion?
Substances leave or enter blood according to their concentration gradient (H-L)
What is vesicular transport?
Endothelial cells use pinocytosis and exocytosis
What is bulk flow?
Fluids flow down pressure gradient
What is filtration?
Fluid moves out of blood
What is reabsorption?
Fluid moves back into blood
What is hydrostatic pressure?
Force exerted by a fluid
What is blood hydrostatic pressure (HPb)?
Force exerted per unit area by blood on vessel wall
What is interstitial fluid hydrostatic pressure (HBif)?
Force of interstitial fluid on outside of blood vessel (0)
What is colloid osmotic pressure?
The pull-on water due to the presence of proteins
What is blood colloid osmotic pressure (COPb)?
Draws fluid into blood due to blood proteins
What is interstitial fluid colloid osmotic pressure (COPif)?
Draws fluid into interstitial fluid
What is net filtration pressure (NFP)?
NFP = (HPb-HPif) - (COPb-COPif)
What is the lymphatic system?
Picks up excess fluid not reabsorbed at venous capillary end and returns it to venous circulation
