Additional Notes Module 4: Capillary Exchange Flashcards
_____ can cross into and out of capillaries via simple or facilitated diffusion
Small molecules
Some ____ can cross in vesicles or through clefts, fenestrations, or gaps between cells in capillary walls.
large molecules
the _____ of capillary and tissue fluid occurs via filtration and reabsorption.
bulk flow
____, the movement of fluid out of the capillaries, is driven by the CHP.
Filtration
_____, the influx of tissue fluid into the capillaries, is driven by the BCOP.
Reabsorption
_____ in the arterial end of the capillary; in the middle section, the opposing pressures are virtually identical so there is no net exchange, whereas reabsorption predominates at the venule end of the capillary.
Filtration predominates
The __ and ___ osmotic pressures in the interstitial fluid are negligible in healthy circumstances.
hydrostatic, colloid
pressure exerted by colloids suspended in blood within a vessel; a primary determinant is the presence of plasma proteins
Blood colloidal osmotic pressure (BCOP)
force blood exerts against the walls of a blood vessel or heart chamber
Blood hydrostatic pressure
force blood exerts against a capillary
Capillary hydrostatic pressure (CHP)
in the cardiovascular system, the movement of material from a capillary into the interstitial fluid, moving from an area of higher pressure to lower pressure
Filtration
pressure exerted by the colloids within the interstitial fluid
Interstitial fluid colloidal osmotic pressure (IFCOP)
force exerted by the fluid in the tissue spaces
Interstitial fluid hydrostatic pressure (IFHP)
force driving fluid out of the capillary and into the tissue spaces; equal to the difference of the capillary hydrostatic pressure and the blood colloidal osmotic pressure
Net filtration pressure (NFP)
in the cardiovascular system, the movement of material from the interstitial fluid into the capillaries
Reabsorption
