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  3. Something in chocolate could be used to stop coughs and lead to more effective medicines, say UK researchers. Their study fo

Something in chocolate could be used to stop coughs and lead to more effective medicines, say UK researchers. Their study fo

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问题     Something in chocolate could be used to stop coughs and lead to more effective medicines, say UK researchers.
    Their study found that theobromine, found in cocoa, was nearly a third more effective in stopping coughs than codeine, which was considered the best cough medicine at present.
    The Imperial College London researchers who published their results online said the discovery could lead to more effective cough treatment. "While coughing is not necessarily harmful(有害的)it can have a major effect on the quality of life, and this discovery could be a huge step forward in treating this problem," said Professor Peter Barnes.
    Ten healthy volunteers(志愿者)were given theobromine, codeine or placebo, a pill that contains no medicine, during the experiment. Neither the volunteers nor the researchers knew who received which pill. The researchers then measured levels of capsaicin, which is used in research to cause coughing and as a sign of how well the medicine are stopping coughs.
    The team found that, when the volunteers were given theobromine, the capsaicin need to produce a cough was around a third higher than in the placebo group. When they were given codeine they need only slightly higher levels of capsaicin to cause a cough compared with the placebo.
    The researchers said that theobromine worked by keeping down a nerve activity(神经活动), which cause coughing. They also found that unlike some standard cough treatments, theobromine caused no side effects such as sleepiness.
What was used in the experiment to cause coughing?
选项 A、Theobromine.
B、Codeine.
C、Capsaicin.
D、Placebo.
答案C
解析 细节理解题。A、B、D三项中的物品是用来做实验的物品。在文章第四段最后一句The researchers then measured levels of capsaicin，which is used in research to cause coughing andas a sign of how well the medicine are stopping coughs．可知Capsaicin(辣椒素)是用来引起咳嗽和作为这些药物如何止咳的依据。
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