Effects of shock intensity, deprivation, and morphine in a simple approach-avoidance conflict situation.
D000818:Animals; D001362:Avoidance Learning; D004597:Electroshock; D005260:Female; D009020:Morphine / Q000494:pharmacology*; D051381:Rats; D013312:Stress, Physiological; D013894:Thirst
D009020:Morphine