During a 24-hour period,an individual excretes in the urine 60 mmol of NH₄⁺,40 mmol of titratable acid,and 10 mmol of HCO₃⁻.If this individual is in acid-base balance,how much nonvolatile acid was produced from metabolism?

Question

Quizplus · Accepted Answer

According to the law of conservation of mass, the amount of acid produced from metabolism should equal the amount of acid excreted in the urine (titratable acid + ammonium ion). Therefore, nonvolatile acid produced from metabolism = titratable acid + ammonium ion = 40 mmol + 60 mmol = 100 mmol/day. The amount of HCO₃⁻ excreted in the urine is not relevant for the calculation of nonvolatile acid production.

During a 24-Hour Period,an Individual Excretes in the Urine 60