Multiple choice general knowledge

The average human brain is ___% water.

  1. 5

  2. 20

  3. 80

  4. 90
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The human brain is approximately 80% water, similar to the water content of the entire body. This high water content is essential for proper brain function, as water is needed for electrical signal transmission, chemical reactions, and removing waste products. Dedration can significantly impair cognitive performance.

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