Oregon Certified Nursing Assistant State Practice Exam

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Prepare for the Oregon Certified Nursing Assistant State Exam. Study with engaging quizzes and comprehensive flashcards. Each question includes hints and clear explanations to enhance understanding. Boost your confidence and get ready to excel in your exam!

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Which nutrient is considered the most essential for life?

Vegetables
Water
Grains
Protein

The correct answer is: Water

Water is considered the most essential nutrient for life because it is vital for numerous physiological processes in the human body. It plays a critical role in maintaining homeostasis, regulating body temperature, and facilitating cellular functions. Water is fundamental for digestion, nutrient absorption, and the elimination of waste products. Without adequate water intake, the body's cells cannot function properly, which can lead to dehydration and severe health issues. While vegetables, grains, and protein provide important nutrients necessary for health and growth, none of them can substitute for the essential role that water plays in sustaining life. The body can survive for longer periods without food than it can without water, underscoring the paramount importance of hydration for survival.