What percentage of water does an average adult lose daily?

The correct answer indicates that an average adult loses approximately 2.5 quarts of water daily, which is about 2.4 liters. This loss comes from various physiological processes, including urination, perspiration, respiration, and evaporation from the skin and the gastrointestinal tract. Understanding this daily loss is crucial because it highlights the importance of replenishing the body's water supply to maintain proper hydration levels, which is vital for various bodily functions such as temperature regulation, nutrient transport, and waste elimination.

While the other values may seem plausible, they do not accurately represent the average daily water loss for a typical adult, making this choice the most accurate reflection of water loss in adults generally.