the studied biochemical parameters of renal tubular function included : 1 ) deamination of amino acids -- with measurement of ammonium ion ( nh4+ ) excretion with urine , 2 ) carbonic acid metabolism -- with determination of urinary excretion of hydrogen ions ( h+ ) , 3 ) urinary excretion of sodium ( na+ ) and potassium ( k+ ) ions .
C0221102
excretion
C0025519
metabolism