科普專欄–薯不揀單 - 三十秒科學–脂肪細胞與糖份

進食含有糖份的食物後，血液胰島素濃度便會上升，輔助細胞們吸取葡萄糖。508Please respect copyright.ＰＥＮＡＮＡFnuux05Tfz
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在利用肌肉細胞及脂肪細胞的實驗中，胰島素錄得可以在數分鐘內增強細胞的吸收葡萄糖效率2-10倍有多。508Please respect copyright.ＰＥＮＡＮＡijxncikh7f
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(圖2)細胞需要特定位於表面的蛋白質幫忙，才能有效吸取糖份。508Please respect copyright.ＰＥＮＡＮＡE7SadjxvfV
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GLUT4是其中一款負責吸取糖份的蛋白質，但它平常所在的位置是在細部內部、而非位於表面。508Please respect copyright.ＰＥＮＡＮＡrWyytOxBSf
當細胞遇上胰島素的時候，GLUT4就會轉移到細胞表面，加快細胞吸收糖份的效率。508Please respect copyright.ＰＥＮＡＮＡXcb3w49Kmd
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(圖3)肌肉細胞及脂肪細胞均擁有GLUT4蛋白質，因此胰島素能增強它們吸取糖份的效率。508Please respect copyright.ＰＥＮＡＮＡKjX6Bo5tF8
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但兩者不同的是，肌肉會將過量的糖份轉化成為糖原(Glycogen)，508Please respect copyright.ＰＥＮＡＮＡc3ftxkFbDU
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而脂肪細胞僅會將過量糖份的5%左右轉化成為糖原，另外的50%轉化成為脂肪(Triglyceride)，其餘的則不會用作儲存。508Please respect copyright.ＰＥＮＡＮＡ6kxTuLDQCD
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值得留意的是，餐後的葡萄糖，僅約20%會被脂肪細胞所吸收，另外80%均由其他細胞使用。508Please respect copyright.ＰＥＮＡＮＡTq9X2pq6WE
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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。508Please respect copyright.ＰＥＮＡＮＡtizb1wfDTK
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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。508Please respect copyright.ＰＥＮＡＮＡCEl8MBkpoU
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https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio508Please respect copyright.ＰＥＮＡＮＡsAGgzeHF3i
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除非Facebook及IG重開侵侵的account，否則我的IG將不會再作更新，只會寄居本土LIHKG及Penana。508Please respect copyright.ＰＥＮＡＮＡ5dtdvBpDsU
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Ref1:https://www.cell.com/cell-metabolism/fulltext/S1550-4131(21)00126-1#fig1508Please respect copyright.ＰＥＮＡＮＡBIuEJDt4EZ

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