As sunlight decreases in the fall,the amount of serotonin released ____ and the amount of melatonin released____.
A) randomly fluctuates; decreases
B) randomly fluctuates; increases
C) decreases; increases
D) increases; decreases

Question

Quizplus · Accepted Answer

Serotonin is typically released in response to sunlight, so as sunlight decreases in the fall, the amount of serotonin released would decrease as well. On the other hand, melatonin is typically released in response to darkness, so as the days get shorter and darker in the fall, the amount of melatonin released would increase.

As Sunlight Decreases in the Fall,the Amount of Serotonin Released