Changes in _____ levels are thought to partly explain winter depressions that occur when people endure several months of long dark days.
A)melatonin
B)acetylcholine
C)androgen
D)dopamine

Question

Quizplus · Accepted Answer

Melatonin levels are known to increase in response to darkness and are involved in regulating sleep-wake cycles. Changes in melatonin levels have been linked to seasonal affective disorder (SAD), a type of depression that occurs during the winter months when daylight is less available.

Changes in _____ Levels Are Thought to Partly Explain Winter