Friday, November 4, 2011
2.73 Glucose reabsorption
understand that selective reabsorption of glucose occurs at the proximal convoluted tubule.
-selective- means that the molecule is selected (glucose)
-reabsorption- go from the glomerular filtrate and it will go back into the blood. remove the molecule from the blood and then put it back.
-filtration occurs in the bowman's capsule.
-items in the filtrate- glucose, water, salts and urea.
-water is removed back into the blood in the collecting duct.
-the end of the nephron is the urine and normally urine does not contain glucose.
-if you test urine for glucose and receive a positive test- indication of condition called diabetes.
-but yet there is glucose in the fluid at the start- in the bowman's capsule- this is because in the proximal convoluted tubule (proximal- first, convoluted- twisted, tubule- tube) section glucose is removed and is taken back into the blood.
-glucose is selectively reabsorbed into the blood in the proximal convoluted tubule.
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