Certified Nursing Assistant (CNA) Prometric Practice Exam

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Prepare for the Certified Nursing Assistant Exam with our comprehensive quiz. Study using flashcards and multiple-choice questions, each with hints and explanations to aid learning. Get ready for your CNA Prometric Exam!

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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.