Biology (Zoology - Grade 11):High School learning: 3 Steps of urine formation <br />The 3 Detailed Structure of Urine Formation. <br />Glomerular Filtration- Filtration causes through pressure from following layers. <br />1- Endothelium <br />2- Epithelium <br />3- Basement Membrane <br />Epithelial Cells (Podocytes): <br />Almost all constituent of blood plasma except the proteins pass into the lumen of Bowman’s capsule. <br />Almost 1100-1200 ml of blood is filtered by kidney per minute. It constitutes 1/5th of the blood pumped out by each ventricle of the heart in a minute. <br />1: GLOMERULAR FILTERATION - <br />. Amount of filterate formed in per minute is called GLOMEULAR FILTERATION. <br />. Normal GFR=125 ml/minute. <br />2: RE ABSORPTION- Process of reclaiming water and the other substances from the tubular fluid Sodium Re absorption Water Re absorption Glucose <br />180 liter of globular filtrate is produced daily. But alcohol 99% is absorbed by the renal tube. <br />So normal urine is released is 1.5 liter. <br />Substances like glucose, amino acids,Na+, etc in filtrate are reabsorbed actively. <br />Nitrogenous wastes are absorbed by passive transport. <br />- Why it has power of re absorption? <br />Simple cuboidal brush border epithelium of pct increases surface area of re absorption. <br /> <br />Tubular Secretion-Cells of PCT and DCT maintain a ionic and acid based balance of body fluids by selective secretion of H+,K+ <br /> <br />Concentration of Filtrate. <br /> <br />Videos by Edupedia World(www.edupediaworld.com), Online Education. <br />All Rights Reserved.
