Filtration

• Renal filtrate 
• plasma minus blood cells and blood proteins
• most reabsorbed (99%)
• Filtration membrane: fenestrated endothelium, basement membrane and pores formed by podocytes
• Filtration pressure : responsibl for filtrate formation
• Glomerular capillary pressure (GCP) minus capsule pressure (CP) minua colloid osmotic pressure (COP)
• Changes caused by glomerular capillary pressure
• Glomerular filtrate, glomerular filtration rate (GFR)
• GFR=180 lt/day
• Inulin is used to calculate GFR
• Inulin can not be reabsorbed or secreted from tubules after filtration
• Urine and plasma amount of inulin are measured after it is given intraenously.