AP PSYCHOLOGY

Detailed explanation-1: -Caffeine is a central nervous system stimulant and the most commonly consumed legal, psychoactive substance. It has a wide range of effects of most people and is considered safe in limited amounts.

Detailed explanation-2: -Caffeine is a naturally occurring central nervous system (CNS) stimulant of the methylxanthine class and is the most widely taken psychoactive stimulant globally.

Detailed explanation-3: -There are two general categories of stimulant medications prescribed, the methylphenidate or amphetamine stimulants. There is no evidence of difference of efficacy between these two types of stimulant, although individuals may respond differently to the two types.

Detailed explanation-4: -The major stimulant drugs are amphetamines and related compounds, methylxanthines (methylated purines), cocaine, and nicotine. Amphetamines achieve their effect by increasing the amount and activity of the neurotransmitter norepinephrine (noradrenaline) within the brain.