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Questions and Answers
What is the primary role of water in biological systems?
What is the primary role of water in biological systems?
- Functioning as a storage medium
- Facilitating electrical conductivity
- Serving as a universal solvent (correct)
- Acting as a source of energy
Which of the following properties of water contributes to its ability to support life?
Which of the following properties of water contributes to its ability to support life?
- High boiling point
- Absence of hydrogen bonds
- Nonpolar molecular structure
- Low density in solid form (correct)
What percentage of the human body is made up of water?
What percentage of the human body is made up of water?
- 60% (correct)
- 75%
- 50%
- 40%
In what form does water exhibit the highest density?
In what form does water exhibit the highest density?
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How does water's high specific heat affect climate?
How does water's high specific heat affect climate?
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Study Notes
Water in Biological Systems
- Water plays a crucial role in biological systems as a solvent, transport medium, and temperature regulator.
- Its polarity makes it an excellent solvent, dissolving a wide range of molecules essential for life.
- Water acts as a transport medium for nutrients, waste products, and gases within organisms.
Properties of Water
- Cohesion and adhesion enable water molecules to stick together, contributing to surface tension and capillary action.
- High specific heat allows water to absorb and release large amounts of heat without significant temperature changes, moderating temperature fluctuations in organisms and the environment.
- Density of water is highest at 4°C, which allows aquatic life to survive in colder temperatures.
Water in the Human Body
- The human body is composed of approximately 60% water, essential for various bodily functions.
Impact of Water's Specific Heat on Climate
- Water's high specific heat helps moderate climate, absorbing and releasing heat slowly, preventing extreme temperature fluctuations in coastal regions.
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