Name the human tissues that contain about 85% water:
Correct answer: C. Brain cells
- A. Muscle cells
- B. Bone cells
- C. Brain cells
- D. None of the above
Explanation
The correct answer is brain cells. Brain cells, or neurons, have a high water content of approximately 85%, which is vital for their role in transmitting signals throughout the nervous system. Muscle cells also contain a significant amount of water, around 75%, but less than brain cells. Bone cells have a much lower water content, around 20%, due to their dense mineral composition. Therefore, the only tissue from the options provided that matches the high water content requirement is brain cells.
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About Biological Importance of Water
Water supports life through its polarity, hydrogen bonding and ability to dissolve ionic and polar substances. Its high specific heat, heat of vaporization, cohesion, adhesion and incompressibility help regulate temperature, transport materials and maintain structure, while hydrolysis and osmosis depend directly on water.
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