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Old 08-14-2011, 11:18 PM   #1
udsk4p63
 
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Default 健尔马足疗机 人为什么吃饱了就犯困-世界美食网-http

人为什么吃饱就犯困

  英国《新科学家》周刊网站日前公布的一项研究成果显示,人们饭后感到困倦是因为血糖水平升高抑制了人脑 中保持清醒和警觉的神经元,健尔马足疗机

  负责这项研究的英国曼彻斯特大学丹尼斯・布尔达科夫教授介绍说:“这一研究结果 符合生物学的基本原理,因为饭后出现困倦可能是身体在叫我们放松以保存能量,健尔马足疗机。”

  布尔达科夫的研究小组对一组名为“Orexin”的神经元的脑细胞进行了研究。Orexin神经元存在 于下丘脑中,能够产生Orexin蛋白质,这种物质在使人保持正常清醒状态方面发挥着至关重要 的作用,盟特光波炉价格。这些神经元在夜间不活跃,如果它们机能失常,就会导致发作性睡眠病,患者会昏昏欲睡。

  以往,专家们知道血糖能够抑制Orexin神经元,但不确定Orexin神经元的敏感程度。布尔达科夫 的研究小组让Orexin神经元经受血糖水平的细微变化,健尔马足疗机厂家,就像每天吃饱和饥饿时血糖水平的变化那样,然后测量它们的放电速率。

  布尔达科夫说:“我们发现,正常吃饭导致的血糖稍微升高就能导致Orexin神经元的活动关闭。”他说 ,这说明血糖较低时神经元比较活跃,所以人吃饱就会犯困,饿着肚子就会睡不着,健尔马足疗机


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