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~100% glucose, amino acids and ~100% of filtered bicarb are reabsorbed. If we don’t want it, we don’t take it back in ~0% of unwanted waste products (e.g. creatinine) ... acute and chronic renal failure . high protein diet will also raise BUN (more amino acids being used for gluconeogenesis) normal BUN: 7-18 mg/dL. Renal philosophy of urine ... ................
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