Kidney Nephron Glomerular Filtration. Watch the next lesson. That selection of what is to go and what is to stay determines innumerable blood concentrations.
Secondary active transport in the nephron. This is the currently selected item. Countercurrent multiplication in the kidney.
Changing glomerular filtration rate.
Changing glomerular filtration rate. The force of hydrostatic pressure in the glomerulus the force of pressure exerted from the pressure of the blood vessel itself is the driving force that pushes filtrate out of the capillaries and into the slits in the nephron. The glomerular filtration rate gfr is considered to be the most important assessment of kidney function. Filtration itself is just about water however so what does it matter that 99 of filtered water is taken back.