Multiple choice general knowledge

In which parts of the body are cells not replaced when they die?

  1. Kidneys

  2. Muscles

  3. Skin

  4. Brain
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Most neurons in the brain and central nervous system are not replaced when they die, which is why brain injuries and neurodegenerative diseases can have permanent effects. While recent research has discovered limited neurogenesis in specific areas, for practical purposes, brain cells do not regenerate like skin, muscle, or kidney cells.

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