Section 2 Function of glomerular Filtration
Section 2 Function of Glomerular Filtration
Functions of the Nephron Reabsorption Secretion Excretion Filtration
Functions of the Nephron Filtration Reabsorption Secretion Excretion
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/day
Filtration ⚫ 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
Reabsorption o Process of returning filtered material to bloodstream ●999 of what is filtered o may involve transport proteins o Normally glucose is totally reabsorbed
Reabsorption ⚫ Process of returning filtered material to bloodstream ⚫ 99% of what is filtered ⚫ May involve transport proteins ⚫ Normally glucose is totally reabsorbed
Secretion o Material added to lumen of kidney from blood o Active transport(usually) of toxins and foreign substances - Saccharine(糖精) Penicillin
Secretion ⚫ Material added to lumen of kidney from blood ⚫ Active transport (usually) of toxins and foreign substances – Saccharine (糖精） – Penicillin