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deziner deziner
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5 years ago
__________, a hormone that triggers feelings of sleepiness, is released at higher levels when you are in dark surroundings.
A) Serotonin
B) Testosterone
C) Estrogen
D) Melatonin
Textbook 
Psychology: From Inquiry to Understanding

Psychology: From Inquiry to Understanding


Edition: 4th
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promiipromii
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5 years ago
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deziner Author
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5 years ago
Thanks
shelbycox
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Yesterday
Just got PERFECT on my quiz
deathwing
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2 hours ago
Helped a lot
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