Mind Matters: Are Your Brain Habits Top-Notch?Share:FacebookPinterestTwitterMailWhat hormone, produced in the brain, helps regulate your sleep-wake cycle?70%Next Correct Incorrect Melatonin signals to your body that it's time to sleep, helping regulate circadian rhythms. What hormone, produced in the brain, helps regulate your sleep-wake cycle? Melatonin Adrenaline Endorphin Dopamine 70%
