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Solve the system by substitution, if possible.
Alcohol And Barbiturates
Substance categories that depress central nervous system activity, potentially leading to decreased anxiety, drowsiness, and at higher doses, anesthesia or death.
Directly Stimulates
To provoke or elicit a response or activity in a direct and immediate manner, usually through physical or chemical means.
Reward Center
Brain structures involved in the process of recognizing and motivating rewarding stimuli, influencing behavior.
Neurotransmitters
Chemicals in the nervous system that transmit signals across a synapse from one neuron to another.
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