| http://www.w3.org/ns/prov#value | - ears to reduce baseline dopamine levels. (Myers Psychology 8e p. 300) ??? ??? ??? opiates opium and its derivatives, such as morphine and heroin; they depress neural activity, temporarily lessening pain and anxiety. (Myers Psychology 8e p. 300) ??? ??? ??? stimulants drugs (such as caffeine, nicotine, and the more powerful amphetamines, cocaine, and Ecstasy) that excite neural activity and speed u
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