Multiple choice general knowledge

The brain can stay alive ______ minutes without oxygen.

  1. 4 to 6

  2. 10 to 12

  3. 1 to 3

  4. 7 to 9
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Permanent brain damage typically begins after 4-6 minutes without oxygen, though some brain activity may persist slightly longer. This window is why immediate CPR and oxygenation are critical in cardiac arrest or drowning cases. The exact time varies by individual and temperature, but irreversible damage starts in this range.

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