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enkephalin |
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enkephalin (ĕnkĕf`əlĭn), one of several naturally occurring morphinelike substances (endorphins endorphins (ĕndôr`fĭnz), neurotransmitters found in the brain that have pain-relieving properties similar to morphine. ..... Click the link for more information. ) released from nerve endings of the central nervous system and the adrenal medulla. They act as analgesics and sedatives in the body and appear to affect mood and motivation. |
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