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Kidney - Coggle Diagram
Kidney
Loop of Henle
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- Mitochodria in the walls of the cells provide energy to actively transport sodium ions out of the ascending limb of the loop of Henle
- The accumulation of sodium ions outside of the nephron in the medulla lowers the water potential
- Therefore water diffuses out by osmosis into the interstitial space and then the blood capillaries (water is reabsorbed into the blood)
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Selective Reabsorbtion
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The concentration of sodium ions in the PCT has decreased as the sodium ions are actively transported out of the PCT into the blood in the capillaries
Due to the concentration gradient, sodium ions diffuse down the concentration gradient from the lumen of the PCT into the cells lining the PCT. This is an example of co-transport as the proteins which transport the sodium ions also carry glucose with it.
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Ultrafiltration
Blood enters the glomerulus through the afferent arteriole creating a high hydrostatic pressure as the blood is split up into lots of capillaries
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Urine
Contains water, salts, urea, hormones, excess vitamins
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