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Merra Merra
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Posts: 3829
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9 years ago
A group of neurotransmitters which serve as natural painkillers are called __________.
A. endorphins
B. gamma aminobutyric acids
C. serotonin
D. norepinephrine
Textbook 
Drugs, Behavior, and Modern Society

Drugs, Behavior, and Modern Society


Edition: 8th
Author:
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NayaNaya
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Posts: 3576
9 years ago
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Merra Author
wrote...
9 years ago
I understand it now Smiling Face with Open Mouth
TY
wrote...
9 years ago
I had a hard time with this, glad it was right
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