Certified Nursing Assistant (CNA) Prometric Practice Exam

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Prepare for the CNA Prometric Test with our quiz. Use multiple choice questions and flashcards with hints and explanations to master the material and ace your exam!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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Which nutrient is considered the most essential for life?

Proteins
Vitamins
Water
Carbohydrates

The correct answer is: Water

Water is considered the most essential nutrient for life due to its critical role in maintaining numerous bodily functions and processes. It constitutes a significant portion of the human body, accounting for about 60% of an adult's body weight. Water is vital for regulating body temperature, transporting nutrients and oxygen to cells, removing waste, lubricating joints, and facilitating digestion. Without adequate hydration, the body can quickly experience negative effects, including dehydration, which can lead to serious health complications, even in a short time frame. While proteins, vitamins, and carbohydrates are all important nutrients for various bodily functions, water is unique in that the body can only survive a few days without it, underscoring its essential nature for life.