Final answer:
The average urine production for a healthy adult is approximately 1.5 liters per day, with a minimum of 0.47 liters necessary for the removal of metabolic waste. The volume can vary due to hydration levels or health conditions like diabetes.
Step-by-step explanation:
A healthy adult typically produces an average of 1.5 liters of urine per day, this amount can fluctuate based on factors such as hydration levels. However, to maintain normal bodily functions and effectively remove metabolic wastes, there is a necessary minimum urine production of about 0.5 quarts (0.47 liters) per day. Conditions like severe dehydration or renal disease can lead to oliguria (reduced urine output), while diseases such as diabetes mellitus or diabetes insipidus can cause polyuria (excessive urine production). Conversely, the kidneys regulate water balance by conserving water when dehydrated and expel excess water if necessary.