title: Chronic morphine administration increases the apparent number of alpha 2-adrenergic receptors in rat brain.
mesh_terms: D000818:Animals; D001921:Brain / Q000187:drug effects / Q000378:metabolism*; D003000:Clonidine / Q000378:metabolism; D007700:Kinetics; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D009928:Organ Specificity; D051381:Rats; D011941:Receptors, Adrenergic / Q000378:metabolism*; D011942:Receptors, Adrenergic, alpha / Q000187:drug effects / Q000378:metabolism*
chemical_list: D011941:Receptors, Adrenergic; D011942:Receptors, Adrenergic, alpha; D009020:Morphine; D003000:Clonidine