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Questions and Answers
Which substance is the world's most widely used psychoactive substance?
Which substance is the world's most widely used psychoactive substance?
- Alcohol
- Caffeine (correct)
- Nicotine
- Cocaine
What does caffeine do to the central nervous system?
What does caffeine do to the central nervous system?
- It damages it
- It has no effect
- It slows it down
- It stimulates it (correct)
What is the safe daily consumption of caffeine for an adult?
What is the safe daily consumption of caffeine for an adult?
- Up to 500 milligrams
- Up to 200 milligrams
- Up to 400 milligrams (correct)
- Up to 300 milligrams
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Study Notes
- Caffeine is the world's most widely used psychoactive substance.
- It stimulates the central nervous system by blocking adenosine molecules.
- Caffeine occurs naturally in coffee, tea, cacao beans, and some tree nuts.
- Daily consumption of caffeine took off sporadically at different times in different places around the world.
- Nearly 90% of the US population has at least one caffeinated beverage every day.
- Up to 400 milligrams of caffeine per day is considered safe for an adult.
- Too much caffeine can cause side effects such as migraines, insomnia, nervousness, and muscle tremors.
- One tablespoon of pure caffeine is equivalent to drinking 75 cups of coffee and can be lethal.
- The FDA banned the bulk sale of products containing pure or highly concentrated caffeine in 2018.
- Caffeine provides benefits such as increased focus, alertness, and energy, but also comes with considerable risks.
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