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What Is Your Level of Sleep Knowledge?
Are you a beginner or an expert in multiple sleep issues, including sleep nature, sleep disorders and treatments? If you want to find it out, you are welcomed to try this quiz. If you manage to answer all the questions correctly, you should think about a career of a “how-to-sleep-well” guru.
What system in human organism is responsible for falling asleep and waking up?
1 Circadian clock
2 Adrenal gland
3 Immune system
4 Gastrointestinal system
  This is 1. question of 15 Wrong answers : 0  
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