No abstract available
Publication types
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Research Support, U.S. Gov't, Non-P.H.S.
MeSH terms
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Animals
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Brain Chemistry
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Escape Reaction / drug effects*
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Male
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Morphine / pharmacology
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Naloxone / pharmacology*
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Oligopeptides / physiology*
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Opium
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Pain / physiopathology*
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Pituitary Gland / physiology
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Rats
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Receptors, Drug / drug effects
Substances
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Oligopeptides
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Receptors, Drug
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Naloxone
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Morphine
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Opium