Final Answer:
Metabolic water production in the human body averages approximately 3 liters daily, primarily resulting from the oxidation of carbohydrates and fats during metabolic processes. Thus the correct option is C. 3 liters.
Step-by-step explanation:
Metabolic water, also known as water of oxidation, is produced within the body as a byproduct of metabolic processes. On average, the human body generates approximately 3 liters of metabolic water daily. This water is a result of the oxidation of macronutrients, including carbohydrates and fats, during cellular respiration.
In the process of cellular respiration, glucose is broken down to produce energy, carbon dioxide, and water. The chemical equation for the oxidation of glucose is C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy.
From this equation, it's evident that for every molecule of glucose oxidized, six molecules of water are produced. Considering the typical daily caloric intake and metabolic activities, the average human body generates around 480 grams of glucose per day. Therefore, the total water produced through glucose oxidation would be 6 times that amount, which equals 2,880 grams or 2.88 liters.
Additionally, fats are also oxidized for energy production. The oxidation of one gram of fat generates about 1.07 grams of water. Given that a significant portion of daily energy requirements is derived from fat metabolism, this contributes to the overall production of metabolic water. When both carbohydrate and fat metabolism are considered, the total daily production of metabolic water averages around 3 liters. Thus, option c) 3 liters is the correct and scientifically supported answer.
Thus the correct option is C. 3 liters.