[Morphine-induced respiratory depression and its mechanism].
D000818:Animals; D001933:Brain Stem / Q000187:drug effects; D004723:Endorphins / Q000502:physiology; D006801:Humans; D009020:Morphine / Q000494:pharmacology*; D009270:Naloxone / Q000494:pharmacology; D018377:Neurotransmitter Agents / Q000502:physiology; D012119:Respiration / Q000187:drug effects*
D004723:Endorphins; D018377:Neurotransmitter Agents; D009270:Naloxone; D009020:Morphine