Examlex
Solve the problem.
-A musician plans to perform 5 selections for a concert. If he can choose from 9 different selections, how many ways can he arrange his program?
Stimulant
A substance that raises levels of physiological or nervous activity in the body, increases alertness, attention, and energy.
Methylphenidate
Methylphenidate is a stimulant medication commonly prescribed to treat attention deficit hyperactivity disorder (ADHD) and narcolepsy, working by increasing attention and decreasing impulsiveness and hyperactivity.
Dopamine And Norepinephrine
Neurotransmitters involved in regulating mood, attention, reward, and arousal, playing key roles in the brain's reward and stress pathways.
Inhibitory Circuits
Neural pathways in the brain that suppress or inhibit the activity of other neurons, playing a central role in controlling brain function and behavior.
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