Which Chemical Is Most Closely Associated With Sleep Melatonin?

Which Chemical Is Most Closely Associated With Sleep Melatonin? Explanation: The pineal gland secretes serotonin by day and converts it to melatonin at night. These chemicals affect mood, anxiety, and sleep. Which hormone is most closely associated with stress? Cortisol. Cortisol is the stress hormone. Which hormone is most closely associated with activating the fight