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?
A. 80 mmol/day
B. 90 mmol/day
C. 100 mmol/day
D. 110 mmol/day
E. 120 mmol/day
ANS: B
Anatomy & Physiology
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