The healthy adult produces about how many milliliters of urine per day?

The correct answer is 1500 mL, as a healthy adult typically produces between 800 mL and 2000 mL of urine daily, with the average being around 1500 mL. This volume can be influenced by various factors, including fluid intake, hydration status, physical activity, and overall health. Adequate urine production is essential for the elimination of waste and the regulation of body fluids, electrolytes, and blood pressure.

When considering the other provided options, 750 mL is on the lower end of normal urine output and may indicate dehydration or a more serious medical condition if sustained over time. The option of 2000 mL, while still within the normal range for some individuals, is towards the higher end and is not as representative of the average daily output. Lastly, 3000 mL is generally considered excessive for a healthy adult and might suggest conditions such as polyuria, where increased urine production is the result of diabetes or other health issues.