推荐回答(5个)
薄荷含有一种叫做薄荷醇的物质,它能刺激皮肤和口腔中的冷受体TRPM8,使身体感到“冷”,但实际上并不改变温度。TRPM8受体存在于感觉神经元中,有一个更直截了当的名字,冷和薄荷醇受体1。顾名思义,其主要功能是接受低温刺激,使身体感到寒冷。同时,一些化学物质可以激活它。除了薄荷醇,还有一种叫冰凌的化学物质也能让我们感到寒冷,它的效力是薄荷醇的200倍!
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薄荷油中可提取薄荷醇。但事实上,天然提取的薄荷醇远远不能满足需求,主要是通过工业合成。它不仅用于制作口香糖或糖果,还用于医药生产多种止痛药和止痒药。它也出现在香烟、牙膏、护发素和其他产品中。
薄荷使你的嘴凉爽的原因,简而言之,是你的皮肤和粘膜上有温度敏感的受体。当人体周围温度降低时,使人体感到“凉爽”的神经感受器神经细胞内外的离子浓度会发生变化,产生电位差,从而产生电信号并沿神经传导。当这个电信号到达神经中枢并被解读时,会让人感到凉爽。
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另一方面,薄荷含有薄荷醇。薄荷醇在常温下能激活我们的身体感受到“凉”的神经感受器,产生“凉”的神经冲动,让我们的大脑在常温或高温的时候也会感受到“凉”的感觉。
薄荷让人感到的“冷”并不是真正的体温下降,而是化学物质对神经系统的一种欺骗。同样,辣椒中的辣椒素也能刺激热敏感受体,使人感到热。
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食用薄荷脑后,虽然薄荷醇不存在,但薄荷醇对口腔粘膜感受器的作用将持续一段时间。所以在这段时间内,喝水或吸入空气会使受体的神经产生“凉”的电信号,从而继续欺骗我们的大脑,认为水或空气是冷的。
很多人会有这个经历,平时喝过薄荷茶、吃过薄荷糖后,嘴巴里感觉凉凉的,连带着呼吸都是凉的,是因为其中的薄荷能够降低口腔内的温度吗?今天就一起了解一下,吃过薄荷为啥会感觉凉凉的?
“凉”可以解释为对温度的感觉。人体有可以感受温度的感受器,当身体处于低温环境或接触低温物体时,这种冷刺激能够激活感受器中的TRPM8受体。这个受体被激活后,能够将这种“冷”信号通过神经传导至大脑皮层的温度感觉中枢,大脑接收到这个“冷”信号,我们就会感受到凉意。
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而薄荷中含有一种成分——薄荷醇,同样具有激活TRPM8受体的作用。吃了含薄荷的食物后,薄荷醇能和口腔中神经细胞膜上负责感测低温的TRPM8受体结合,将神经细胞上传递“冷”信号的通道打开,将这种“冷”信号传递到大脑,让我们产生凉凉的感觉。
也就是说,薄荷进入口腔给我们带来的丝丝凉意,并不是因为薄荷降低了口腔的温度,而是薄荷醇“欺骗”了大脑,让我们产生“好凉”的错觉。
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薄荷所产生的清凉感与一般冰冻食品带来的直接冰凉感不同,所以在炎炎夏日,不想吃冰淇淋、雪糕、冰棍的人,不妨用几片薄荷叶泡水试试。
参考来源:吃过薄荷为啥会有凉凉的感觉?
因为薄荷就是一种可以提神的东西啊你吸口气的话都会凉快
因为薄荷就是这种味道。里面的物质会让你的舌尖很凉。
这个就是因为薄荷里面含有的物质会使人有那种冰凉的感觉
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