title: Further evidence for an unique neurohumoral agent released from brain by morphine given intracerebrally.
mesh_terms: D000818:Animals; D001921:Brain / Q000187:drug effects / Q000502:physiology*; D002490:Central Nervous System / Q000187:drug effects; D002606:Charcoal; D003248:Constipation / Q000139:chemically induced; D003864:Depression, Chemical; D005769:Gastrointestinal Motility / Q000187:drug effects; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D018377:Neurotransmitter Agents / Q000378:metabolism*; D010227:Parabiosis; D051381:Rats; D009435:Synaptic Transmission
chemical_list: D018377:Neurotransmitter Agents; D002606:Charcoal; D009020:Morphine