Mass Balance Involves Determining the Total Amount of a Substance

Multiple Choice

Mass balance involves determining the total amount of a substance in the body.We can determine the rate of production (i.e.Mass Flow) of this substance by which of the following formulas?

A) intake + production - excretion - metabolism.
B) (amount of substance / min) × (concentration of the substance)
C) volume of flow / (amount of substance / min)
D) (concentration of a substance) / volume flow
E) (concentration of a substance) × (volume/min)