Saturday, June 2, 2012

How does Nephron work


The nephrons role is for the blood to filtered and urine formed. In each nephron, high pressure in the glomerulus pushes water and small dissolved materials into extravascular space of the Bowman’s capsule and into the tubule. The proximal tubule reabsorbs water, salts, glucose, and amino acids to maintain electrolyte levels in the body. The loop of Henle salts will be excreted in the urine, making a concentration gradient in the medulla. The Henle’s loop is absorbant to particular ions with the cortical thick draining into the distal convoluted tubule. The distal tubule contains cells that active transport and maintains urine and blood pH levels, especially the regulation of sodium and potassium. Fluid later passes from the distal tubule to the collecting ducts. Ultra filtration occurs in the cortex in the cortical collecting ducts, which is the last process of the nephron. The urine then passes through the collecting ducts through the drainage system of the kidney to the ureters and bladder for urination. The counter current system is similar to the nephron because the loop of henle is to be able to create dilute urine or concentrated urine depending on what the body wants and needs. Nephron is also similar to hydrostatic skeleton because their function both removes waste and both needs pressure to remove filters. 


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