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caffeine
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Caffeine, a odorless slightly bitter substance that is in most caffeinated beverages.
Caffeine is present in about 4% of tea leaves and in coffee. Caffeine contains two other
alkaloids, theobromine and theophylline. These two relax the muscles while the caffeine
stimulates the heart and respiratory systems. The caffeine in a substance is a stimulant of central
nervous system, cardiac muscle and respiratory system. Its purpose is to delay fatigue. The
theophylline is a cardiac stimulant...
Approximate word count: 726
Approximate pages: 3 (250 words per
double-spaced page) |
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