Structure of the NEPHRON- A-level Biology. Ultrafiltration and selective reabsorption in the kidney
Miss Estruch
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The lesson explains how the nephron’s structure (renal capsule, PCT, loop of Henle, DCT and collecting duct) enables ultrafiltration through a three-layered glomerular barrier and selective reabsorption via sodium-driven transport and medullary gradients to concentrate urine while retaining proteins and cells.
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Best quote from Structure of the NEPHRON- A-level Biology. Ultrafiltration and selective reabsorption in the kidney
If they're in the desert, they're going to need more water to be reabsorbed; therefore, they'll have a longer loop of Henle so that more sodium ions can be actively transported out, and consequently, more water will be reabsorbed.
—Miss Estruch
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