BIO 203 Lecture 19

BIO 203 Lecture 19 - Renal Physiology Lecture 19 Function of mammalian kidney Regulation of salt and water balance Reclaiming water and solute

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Renal Physiology Lecture 19 4/10/07 Function of mammalian kidney Regulation of salt and water balance Reclaiming water and solute Removal of metabolic waste byproducts – urea, uric acid, creatinine Removal of foreign chemicals – pesticides, drugs [penicillin], food additives Filter about 180L per day, twice an hour, excrete 1.8 Liters, 99% reabsorbed Similar for sodium and glucose, reabsorbing 99.5% sodium and about 100%  with glucose Urea – 44% reabsorbed, much is excreted Gluconeogenesis – generate glucose by kidneys Secrete 2 hormones and an enzyme Erythropoietin (stimulates RBC production at high altitudes)
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Vitamin D3 – reabsorption of Ca++, homeostasis Enzyme – Renin – controls formation of angiotensin II which influences blood  pressure and Na+ homeostasis 2 different parts of nephrons Medullary – concentration of urine Cortex  Review of Nephron Blood comes in and enters in renal corpuscle, composed of glomerular  capillaries, surrounded by Bowman’s space/capules, space surrounded by 
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This note was uploaded on 04/08/2008 for the course BIO 328 taught by Professor Cabot during the Spring '07 term at SUNY Stony Brook.

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BIO 203 Lecture 19 - Renal Physiology Lecture 19 Function of mammalian kidney Regulation of salt and water balance Reclaiming water and solute

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