paganini
Forum Senior
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In a canine experiment, a dog's filtered load of sodium in an isolated pump-perfused kidney is found to be 15 mmol/min. (1) How much sodium do you predict remains in the tubule at the end of the proximal tubule? (2) If its GFR is suddenly increased by 33%, how much sodium now is left at the end of the proximal tubule?
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| new_n_lost
Politically InCorrect
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(1) How much sodium do you predict remains in the tubule at the end of the proximal tubule?
60%
2) If its GFR is suddenly increased by 33%, how much sodium now is left at the end of the proximal tubule?
60%
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| paganini
Forum Senior
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1) 5 mmol/min. Approximately two thirds of filtered sodium is reabsorbed by the proximal tubule. (2) 6.6 mmol/min. Filtered sodium rises from 15–20 mmol/min. Glomerulotubular balance maintains fractional sodium reabsorption at approximately two thirds of the filtered load.
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| drduck
Forum Guru
Topics: 82
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this was easy........
1.......5
2......~6
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