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  3. Bad eating habits, increased food availability, increasingly sedentary lifestyle and reduced physical activity are the first fou

Bad eating habits, increased food availability, increasingly sedentary lifestyle and reduced physical activity are the first fou

admin2009-08-19  38
问题 Bad eating habits, increased food availability, increasingly sedentary lifestyle and reduced physical activity are the first four causes of the obesity epidemic.
Less sleep can gain us weight, because it raises our leptin, which triggers us to eat more.
选项
答案N
解析 本题涉及到Less sleep与leptin的关系，从而将题目出处定位到Not Enough Sleep部分。该部分第三段末句提到，睡眠不足时，Leptih显示过饱的激素会下降而ghrelin，显示饥饿的激素则会增加，这会促进我们的食欲。所以增加的是ghrelin而不是leptin。故答案为N。
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大学英语六级

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