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Absorption in the PCT (By the end of PCT (2/3 water reabsorbed (Osmosis),…
Absorption in the PCT
By the end of PCT
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2/3 sodium reabsorbed (sodium-potassium pumps, symporters, antiporters)
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Tubular reabsorption
Process of returning important substances ("good stuff") from filtrate back into the renal interstitium then into renal blood vessels.
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Proteins. A few small ones can get through. Must be broken down into amino acids in tubular cells, can then be absorbed by capillaries
Tubular secretion
Provides additional (or sometimes only) opportunity to increase urinary excretion of specific substances
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Urea
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If filtration rate decreased, more time so > reabsorbed
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