Urinary SystemUrine Formation I: Glomerular Filtration*As fluid travels through the nephron, its composition changes, thus its name*Glomerular filtrate-fluid in the capsular space that is similar to blood plasma except that it has almost no protein*Tubular fluid-fluid from the PCT through the DCT*Differs from the glomerular filtrate in that substances are removed and added by the tubule cells*Urine- fluid that enters the collecting ductsComponents of Filtration*Filtration membrane- the barrier through which the fluid must pass to enter the capsular space. Consist of:*The fenestrated endotheliumof the capillary *The basement membrane*Filtration slitsThe Filtration Membrane*The fenestrated endothelium of the capillary- the honeycombed structure of the capillary endothelium, containing large pores that allow various substances to pass through (not blood cells or large proteins)The Filtration Membrane*The basement membrane-Its structure is like a kitchen sponge. Most particles larger than 8nm are held back and those with negative charge due to the repelling force created
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