Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Transcribed Image Text:### Is Water a Nutrient? Support Your Answer with Examples.
Water is a vital component necessary for life, fulfilling essential functions in the human body. Despite often being overlooked, it is classified as a nutrient due to its critical role in numerous biological processes.
**Function of Water in the Body:**
1. **Hydration and Cellular Function:**
- Water is the primary solvent in the body, facilitating cellular operations and reactions.
- It is essential for maintaining cell structure and transporting nutrients and waste products in and out of cells.
2. **Temperature Regulation:**
- Water aids in regulating body temperature through sweating and respiration.
- It helps in dissipating heat generated by metabolic processes.
3. **Lubrication and Protection:**
- Water acts as a lubricant for joints and tissues.
- It forms a protective cushion for vital organs, including the brain and spinal cord.
**Examples Supporting Water as a Nutrient:**
1. **Dietary Sources:**
- Water itself, found in fruits and vegetables, such as watermelon, cucumbers, and oranges.
- Beverages like herbal teas and soups contribute significantly to daily water intake.
2. **Physiological Evidence:**
- Dehydration studies show a detrimental impact on bodily functions, underscoring water’s irreplaceable role.
- Athletes and individuals in hot climates require higher water intake to compensate for losses due to sweat.
In summary, water meets the criteria of a nutrient due to its fundamental roles in hydration, metabolic processes, and overall physiological balance. Ensuring adequate daily water intake is crucial for maintaining optimal health and bodily functions.
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