Multiple choice general knowledge

Your brain is 2% of your total body weight, but uses ____% of your body’s energy

  1. 35

  2. 20

  3. 2

  4. 40
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The brain accounts for approximately 2% of body weight but consumes about 20% of the body's total energy and oxygen. This disproportionate energy use is due to the brain's high metabolic demands for electrical signaling, neurotransmitter synthesis, and maintaining ion gradients. This fact is often cited in neuroscience.

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