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。444Please respect copyright.PENANA7QnUT9hR9X
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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。444Please respect copyright.PENANAbO5ewwzC1N
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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。444Please respect copyright.PENANAWbyTIVM3VY
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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。444Please respect copyright.PENANAiUNGpmDNge
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。444Please respect copyright.PENANAneOPLNkkB7
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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。444Please respect copyright.PENANAYteFfOYpHE
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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),444Please respect copyright.PENANAwBYUXAAZ7e
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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。444Please respect copyright.PENANAVMD1EBNZ6U
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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。444Please respect copyright.PENANAXCCYrlNGXZ
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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。444Please respect copyright.PENANABjZXq1DdGW
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Link:444Please respect copyright.PENANAgxeOBnmG9r
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio444Please respect copyright.PENANAnssJeyE0Qj
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Ref1:https://www.cell.com/cell-metabolism/fulltext/S1550-4131(21)00126-1#fig1444Please respect copyright.PENANAdcEmWMb3aA