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Summary Of Nicotine And Caffeine

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Nicotine and Caffeine have been associated with increased heart rate and blood pressure in humans, mainly due to nicotine stimulation of catecholamine release by activation of acetylcholine receptors (Hass 1997). An experiment using Lumbriculus variegatus, “black worms”, was performed in which black worms were exposed to different treatments of nicotine and caffeine in order to measure pulsation rate in number of beats per minute. the objective of this experiment was to determine the effect of the common drugs nicotine and caffeine on the circulatory system of black worms. The results indicated that… In 1997, an important study on guinea-pigs revealed that nicotine increases blood pressure, heart rate and myocardial contractility due to

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