Adult-Gerontology Clinical Nurse Specialist (CNS) Practice Exam

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How much fluid should a healthy adult generally consume each day?

500 - 1,500 ml/day
1,800 to 2,500 ml/day
100 ml/kg/day
1,000 to 1,500 ml/day

The correct answer is: 1,800 to 2,500 ml/day

The correct amount of fluid for a healthy adult to consume each day typically ranges from 1,800 to 2,500 ml. This guideline takes into consideration various factors that impact hydration needs, including age, sex, weight, climate, activity level, and overall health. The general recommendation aligns with the Institute of Medicine's suggestions for total daily water intake. This total includes all beverages and food sources, as many foods contain water and contribute to hydration. For most adults, aiming for approximately 2 liters (or around 8 cups) is a common target for maintaining adequate hydration. This fluid intake is important as it supports numerous physiological functions, including temperature regulation, joint lubrication, nutrient transportation, and waste elimination. Insufficient fluid intake can lead to dehydration, which may impair these essential functions and overall health. Therefore, recognizing that 1,800 to 2,500 ml/day encompasses the majority of healthy adults provides a more flexible and realistic approach to ensuring adequate hydration.