11.9.05 - November 9 2K5 Animal hormones and chemical...

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November 9, 2K5 Animal hormones and chemical  control Web quiz 9, questions on class discussion Kidney Capillary System o Filtration - nephron collects filtrate from blood o Reabsorbtion – reclaim the substances you wants o Secretory – more toxins added to filtrate o Excretion- filtrate is dumped (peeing) Glmerus Filtrate – water, hco3-, ureU, SALTS, etc. Proximal consulate. Water, hco3-, k+, are diffusing out. Ammonia nd H+ ions diffuse in. Loop of Henle Descending limb permeable to water, not solutes, so water diffuses out . hi osmolarity out side. Loop of Henle (bottom) Here, at the bottom of the loop, osmolarity is really high cuz only solutes are left, but the ascending part of the loop is permeable to salts, so they diffuse out. DTC consulate. Water, hco3-, and salts are diffusing out. K+ nd H+ ions diffuse in.
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How the Kidney Concentrates Urine In PCT, the osmolarity is 300 mosm/L In Pt1 of LoH, water is pulled out, so the osmolarity increases to about 1000
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