AP PSYCHOLOGY

Detailed explanation-1: -Rationale: Caffeine is a well-known stimulant that can be used to increase alertness and performance especially in low arousal situations such as monotonous highway driving or after sleep deprivation.

Detailed explanation-2: -Multiple sleep latency test results by Rosenthal et al., (1991) showed that caffeine at doses of 75 and 150 mg increases alertness whether an individual is fully rested or partially sleep deprived.

Detailed explanation-3: -Once consumed, caffeine is very quickly absorbed and distributed throughout your body, including to your brain. It’s here that caffeine elicits its most classic effect-helping keep you alert and awake. Caffeine accomplishes this by blocking sleep-promoting receptors in your brain called adenosine receptors.

Detailed explanation-4: -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. Learn more about: Effects of caffeine.

Detailed explanation-5: -Because caffeine acts as a central nervous system (CNS) stimulant, people usually take it to feel more alert and energetic. Caffeine can improve mood and help people feel more productive. It is believed to work by blocking the neurotransmitter adenosine’s receptors, increasing excitability in the brain.