What is the relationship between long winter nights,melatonin,and serotonin?

Question

Quizplus · Accepted Answer

Melatonin is a hormone that is released by the pineal gland in response to darkness and helps regulate the sleep-wake cycle. During long winter nights with decreased sunlight exposure, more melatonin is produced. Serotonin is a neurotransmitter that is involved in regulating mood and behavior. Sunlight exposure triggers the release of serotonin, so during long winter nights with decreased sunlight exposure, less serotonin is produced. Therefore, long winter nights increase melatonin and decrease serotonin.

What Is the Relationship Between Long Winter Nights,melatonin,and Serotonin