Caffeine is the most frequently used psychoactive drug in North America. Caffeine stimulates the brain by blocking chemicals that normally inhibit or slow nerve activity. Its effects become apparent with doses as small as 50 milligrams, the amount found in about one-half cup of brewed coffee.
Physically, caffeine causes sweating, talkativeness, tinnitus (ringing in the ears), and hand tremors.
Psychologically, caffeine suppresses fatigue or drowsiness and increases feelings of alertness.
Abuse: Serious abuse may result in an unhealthy dependence on caffeine known as caffeine's. Insomnia, irritability, loss of appetite, chills, racing heart, and elevated body temperature are all signs of caffeinism. Many people with these symptoms drink 15 or 20 cups of coffee a day. However, even at lower doses, caffeine can intensify anxiety and other psychological problems.
Caffeine has a variety of health risks. Caffeine encourages the growth of breast cysts in women, and it may contribute to bladder cancer, heart problems, and high blood pressure. Pregnant women who consume 6 or more cups of coffee a day double the risk of having a miscarriage.
It is wise to remember that caffeine is a drug and should be used in moderation.
Hope this helps! Good luck on your project! =)
2006-10-10 09:41:46
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answer #1
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answered by Anonymous
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In laboratory tests caffeine has been shown to improve the performance of simple, familiar, routine tasks and impair the accomplishment of complex, novel, unpracticed tasks. A number of studies have found that people who drink at least two portions of caffeinated beverages a day report improved moods, a better social disposition, more self-confidence and energy.
In a series of studies on caffeine and its effects on memory, results showed that while coffee helps people to feel less drowsy and fatigued and allows them to perform more effectivley on manual or perfunctory tasks such as typing or calculating, it does not significantly alter numerical reasoning, short term memory or verbal fluency. In other words, caffeine helps you to stay awake, but it will not necessarily improve your intellectual skills.
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2006-10-10 09:37:10
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answer #2
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answered by lulu 2
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