Percentage of water in brain cells is_______?
Correct answer: C. 85%
- A. 20%
- B. 65%
- C. 85%
- D. 89%
Explanation
Brain tissue contains a high proportion of water, commonly given in introductory biology as about 85%, because water forms the medium for cellular reactions and transport. Students may choose 65%, a value associated with the approximate water content of the whole human body rather than brain cells.
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