Multiple choice general knowledge science & technology What is the name of the hormone which awakes us from our sleep? Relaxin Seretonin Melatonin insulin Reveal answer Fill a bubble to check yourself B Correct answer Explanation Serotonin is the neurotransmitter and hormone that helps regulate wakefulness, alertness, and mood. It works opposite to melatonin - while melatonin induces sleep, serotonin promotes wakefulness and helps you feel alert and awake.