Why does our body choose to restore its energy, hormones, etc specifically when we sleep? Is there a specific group of molecules/receptors that allow the body to regenerate? I would like to know the exact process of how this occurs when we sleep.

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    $\begingroup$ What is your source that the body "restores its energy, hormones, etc" during sleep? If you're referring to how you "feel tired" before sleep, that does not have much to do with sleep "restoring energy", that's just you relieving the behavioral cue to sleep, it does not relate to caloric energy. $\endgroup$
    – Bryan Krause
    May 12 at 21:17
  • $\begingroup$ Stage 3 of NREM sleep is also known as the regeneration phase. This is when the body goes under most of its regeneration of cells. $\endgroup$ May 13 at 14:40
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    $\begingroup$ What does "regeneration of cells" mean? What is your source for that statement? $\endgroup$
    – Bryan Krause
    May 13 at 15:00


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