How does solutes enter and exit the lumen of the blood vesse
How does solutes enter and exit the lumen of the blood vessels?
How does solutes enter and exit the lumen of the blood vessels?
Solution
-Small molecules can move into and out of capillaries throughfacilitated diffusion.
- Large molecules can go in vesicles or through clefts, fenestrations, or gaps between cells in capillary walls.
-Filtration, the movement of fluid out of the capillaries, is driven with the aid of the CHP.
-Reabsorption, the inflow of tissue fluid into the capillaries, is driven with the aid of the BCOP.
-Filtration predominates within the arterial end of the capillary; within the center phase, the opposing pressures are surely equal so there may be no net exchange.
-Reabsorption predominates at the end of the capillary. The hydrostatic and colloid osmotic pressures inside the interstitial fluid are negligible.
