由我們出世一刻起,心臟便不辭勞苦工作,將血液送至全身,沒有休息的一刻。453Please respect copyright.PENANAc0WoyuVeX2
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你又有沒有想過,心臟究竟係「食咩大㗎呢」?453Please respect copyright.PENANAow8wvzcAYQ
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(圖2)有科學家為了解答這個問題,找來110個病人(87個心臟正常,23個心臟出現問題),請示測試者禁食一晚,然後再進行全身麻醉。453Please respect copyright.PENANAaFZZCLjP9X
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在麻醉期間的1小時裡,分別抽取對應部份血管的血液,從而計算出心臟及腳部的新陳代謝狀況(Ref1)。453Please respect copyright.PENANAcbbdc9SRgZ
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(圖3)綜合所有證據顯示,心臟同腳部均會大量吸收Ketone Bodies,Acetate及Glutamate。453Please respect copyright.PENANA7171K2ymVz
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有趣的是,腳部會選擇性地吸收飽和脂肪酸,而放出非飽和脂肪酸,453Please respect copyright.PENANA5ZmHrUykwn
但心臟莫論飽和與否均會全數吸收,其中脂肪酸更成為了它能量來源70%有多。453Please respect copyright.PENANAXSSMoZhCgn
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某程度上可以說心臟是「食脂肪大的」。453Please respect copyright.PENANAQYolqFj3Au
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另外,心臟同腳部均有釋放氨基酸的跡象,顯示細胞的蛋白質一直處於分解狀態,而心臟其速度比腳部快10倍有多。453Please respect copyright.PENANAEk7am0Zti0
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對比健康心臟及心臟出現問題的病人,出現問題的心臟會吸取更多的Ketone Bodies及增加氨基酸的釋放數量。453Please respect copyright.PENANAPAZzpiu80i
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究竟吸取更多的Ketone Bodies和增加氨基酸釋放量是為了阻擋心臟出現進一步惡化,還是因為出現問題所致而成,這方面還需要進一步的研究。453Please respect copyright.PENANANatiaeXUkL
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如果想我快啲出文的話,請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark,這對我非常之重要。453Please respect copyright.PENANA2D5wY6mqHG
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Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc453Please respect copyright.PENANAxK3dVNYdF0
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同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」,以課金的方式推動我繼續搜羅資料寫文,多謝。453Please respect copyright.PENANA7hkEpqcv1u
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Link:453Please respect copyright.PENANAxMfcuQZuDa
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio453Please respect copyright.PENANAeP4PN6yx8u
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有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。453Please respect copyright.PENANAiJ1Fj8fMl6
https://www.instagram.com/potatopigtongue/453Please respect copyright.PENANAplr23Omra3
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Ref1:https://science.sciencemag.org/content/370/6514/364453Please respect copyright.PENANAeBtuvMKskW