Filtration o First step in urine formation o Bulk transport of fluid from blood to kidney tubule Isosmotic filtrate Blood cells and proteins dont filter o Result of hydraulic pressure ●GFR=180L/dayFiltration ⚫ First step in urine formation ⚫ Bulk transport of fluid from blood to kidney tubule – Isosmotic filtrate – Blood cells and proteins don’t filter ⚫ Result of hydraulic pressure ⚫ GFR = 180 L/day