<prompt> Normal protein excretion in urinedaily:0-20 mg90-120 mg500-1000 mg100-500 mg  <response>: The amount of protein in the urine is normally 150 mgday.?90-120 mg Protein handling at the glomerular filtration barrier : The endothelium is fenestrated contains holes and is freely permeable to water, small solutes, and most proteins; but not permeable to the blood cells. The basement membrane is a porous matrix of negatively charged proteins.The basement membrane is primarily considered as a charge-selectivity barrier; The processes of the podocytes interdigitate to cover the basement membrane and are separated by gaps called filtration slits. .They function primarily as the size-selective filter. It should also be noted that Normally, the filtered proteins are almost entirely reabsorbed in the PCT; only a small quantity thus may appear in the urine. 