August 6, 2021
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【寒毛直豎】好聽的歌也會讓人毛管戙
⭐小編寫這po時全身不斷起雞皮
⭐只是想一想那些聲音已刺激到交感神經
#星期六隻眼閉
讓人起雞皮的時刻
夏天天氣異常炎熱，但當聽到某種聲音，人會不由自主地「起雞皮」（又叫做毛管戙）甚至「打冷震」，你知道為甚麼會有這種生理反應嗎？當我們感到寒冷時，「交感神經」會刺激體毛的「立毛肌」收縮，令毛髮形成豎立狀態，皮膚隆起堵住毛孔，避免體內的熱能從毛孔流失，就是我們感受到「起雞皮」的感覺。除了寒冷，當我們恐懼、緊張或興奮時都有「起雞皮」的情況，據說是因為人類未進化前全身是毛，豎起毛髮體形看起來更強大能嚇退敵人。有些聲音特別容易讓人「起雞皮」，你想到是哪些嗎？
? 將冰塊咬碎
? 刀叉刮過碟子
? 指甲刮過黑板
? 發泡膠互相摩擦
? 不悅耳的拉二胡或小提琴聲音
炎夏時從戶外進入冷氣地方時，有時會不由自主地「打冷震」，很多時我們身上仍帶着汗水，當心因而感染風寒，故進入冷氣地方前要擦乾汗水，並且隨身準備外套或圍巾保暖。
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Goosebumps moments
The summer’s heat is exceptionally hot, but there are some sounds that can trigger goosebumps as if we have caught a cold. Do you know what causes this biological reaction?
When we feel cold, our sympathetic nervous system will cause the arrector pili muscles to contract, making our hair stand on end. This is to block the pores to prevent heat from dissipating, and that is what goosebumps feel like.
The same thing would happen when we are fearful or feel nervous or excited. Rumors have it that the human species tens of thousands of years ago were once covered in fur, and they would erect the hair on their body to scare off their enemies.
Certain sounds tend to give us goosebumps. Can you think of any?
? Chewing ice
? Scratching the surface of a plate with a fork or a knife
? Scraping a chalkboard with fingernails
? Rubbing two Styrofoam pieces against each other
? Unpleasant erhu or violin sound
When we enter an air-conditioned space from the outdoors during summer, the wind from the air-conditioner can give us chills. Having sweat on our body might cause us to catch a cold, so remember to wipe the sweat off our body before entering an air-conditioned environment. Also, carry a jacket or scarf with us all the time to keep us warm.
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