If a person’s liver makes 1000 mg/hour of urea during an average day, what would the concentration of urea be, in mg/mL, for a person making 1.0 L of urine during a particular day? What would it be for a person making 1.5 L of urine during a particular day?

To determine the concentration of urea in the urine, we need to divide the amount of urea produced by the liver (in milligrams) by the total volume of urine produced (in milliliters) during a particular day.

For a person making 1.0 L of urine:
Step 1: Convert the volume of urine to milliliters:
1.0 L = 1000 mL

Step 2: Divide the amount of urea produced (1000 mg) by the volume of urine produced:
Concentration = Amount of urea / Volume of urine
Concentration = 1000 mg / 1000 mL
Concentration = 1 mg/mL

Therefore, the concentration of urea for a person making 1.0 L of urine during a particular day would be 1 mg/mL.

For a person making 1.5 L of urine:
Step 1: Convert the volume of urine to milliliters:
1.5 L = 1500 mL

Step 2: Divide the amount of urea produced (1000 mg) by the volume of urine produced:
Concentration = Amount of urea / Volume of urine
Concentration = 1000 mg / 1500 mL
Concentration ≈ 0.67 mg/mL (rounded to two decimal places)

Therefore, the concentration of urea for a person making 1.5 L of urine during a particular day would be approximately 0.67 mg/mL.