Multiple choice general knowledge

A bright light shone on the backs of human knees can reset the brains sleep -wake clock

  1. True

  2. False

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Research in the late 1990s discovered that the area behind the knee (popliteal region) contains light-sensitive cells that can influence circadian rhythms, potentially helping to reset the sleep-wake clock.