No abstract available
MeSH terms
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Animals
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Brain / metabolism*
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Electric Stimulation
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Endorphins / pharmacology*
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Enkephalin, Leucine
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Enkephalin, Methionine
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Enkephalins / pharmacology*
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Guinea Pigs
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Ileum / physiology
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Male
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Mice
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Morphine / pharmacology
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Muscle Contraction / drug effects
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Rats
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Receptors, Opioid / metabolism*
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Vas Deferens / physiology
Substances
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Endorphins
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Enkephalins
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Receptors, Opioid
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Enkephalin, Methionine
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Enkephalin, Leucine
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enkephalin-Met, acetaldehyde-
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enkephalin-Leu, acetaldehyde-
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Morphine