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1.冬天,人是怎样感觉到冷的? 在人的皮肤上分布着许多种“感受器”,如“压力感受器”、“触觉感受器”、“痛觉感受器”及“温度感受器”等等。感受器就是纤细的神经末梢膨大起来的特殊结构,能感受外界的各种刺激。人的皮肤温度大约是25℃,如果外界低于这个温度,首先刺激到皮肤的“温度感受器”,它立即把感受到的信息通过神经传入脑部的“温度中枢”,经过中枢的分析,就知道是“冷”了。另外,视觉对“冷”的经验也很重要,如看到冰雪就一定知道是冷;有时听觉也起作用,如听到北风呼啸,也能肯定是“冷”来了。
1. How do people feel cold in winter? There are many “receptors” such as “baroreceptors,” “haptics,” “nociceptors,” and “thermosensors.” Receptacle is a special structure of thin nerve endings swelling, can feel the outside world a variety of stimuli. Human skin temperature is about 25 ℃, if the outside world below this temperature, the first to stimulate the skin's “thermoreceptor”, it immediately felt the information transmitted through the brain into the “temperature center,” through the central analysis, I know it is “cold”. In addition, the visual experience of “cold” is also very important. If you see ice and snow, you must know that it is cold. Sometimes hearing also works. If you hear the howling of a north wind, you can certainly be “cold”.