我們身體的細胞,會否作出多餘或者浪費的事情呢?332Please respect copyright.PENANAftBHk2y8Gj
332Please respect copyright.PENANAv6Z3bfARaN
332Please respect copyright.PENANA3ZGPdyJWNo
(圖2)超級簡化來說,我們細胞內含的粒線體能夠將我們所攝取的營養經由一系列的過程轉化成為ATP。332Please respect copyright.PENANArVjvASfK35
332Please respect copyright.PENANA5SNUUBxB3Y
332Please respect copyright.PENANAHLfgPRdyg8
ATP能夠為細胞提供所需的能源,我們的手腳之所以可以伸縮自如,全賴身體肌肉細胞等耗用ATP才能達成。332Please respect copyright.PENANAqaviDoeHmq
332Please respect copyright.PENANAI6ZtCzxobu
(圖3)而唯獨在專門製造熱能的啡色脂肪細胞粒線體裡頭,內裡有一隻名為CKB(Creatine Kinase B)的蛋白酶會迅速透過Creatine將大量的ATP立刻轉回為ADP以及Phosphocreatine;332Please respect copyright.PENANAm3p2ItXRec
肌肉細胞及白色脂肪細胞雖然也會進行這步驟,但效率遠遠低於啡色脂肪細胞。332Please respect copyright.PENANA8TUGRRVq2d
332Please respect copyright.PENANAH5gR34Owzl
332Please respect copyright.PENANAmcRKMORNOB
332Please respect copyright.PENANApUu1t1UoFU
ADP並不是細胞通用的能量單位,辛辛苦苦將得來的ATP又轉回成為ADP,情形就如在中國大陸境內將辛苦得來的美金(ATP)轉換為人民幣(ADP)一樣,驟眼看起上來超級無謂及浪費。332Please respect copyright.PENANAXakgryYb2R
332Please respect copyright.PENANA7jDuet1YcR
332Please respect copyright.PENANA8zsy7hYR3C
雖然細胞可以透過Phosphocreatine及ADP轉化成為ATP及Creatine,但在咖色脂肪細胞裡頭,這情況在大部分的時間也沒有發生,正如大陸境內沒法能夠兌換人民幣(ADP)為美金(ATP)一樣。332Please respect copyright.PENANA9olCsDVBNS
332Please respect copyright.PENANAEMQoaa8QSI
理論上,身體細胞理應發展出一套非常完善的系統,不會做出多餘浪費的行為。332Please respect copyright.PENANAidGuXu2xrw
332Please respect copyright.PENANAr6bsQc34qi
而現時開始有證據顯示,這「浪費行為」相信能夠輔助啡色脂肪將營養轉化成為熱能,而非能量的儲存。332Please respect copyright.PENANASJXUCXXlt2
332Please respect copyright.PENANAjCOXVaWaa9
若能夠完整地理解整個機制,或許可透過藥物影響肚腩(白色脂肪)的CKB蛋白酶含量,將肚腩脂肪逐一消耗成為熱能,達減肥之效。332Please respect copyright.PENANAAZGcmJjmjF
332Please respect copyright.PENANAraMd9sKWDW
332Please respect copyright.PENANAKeCVV5dTz3
332Please respect copyright.PENANAbTHjfxOQ6t
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。332Please respect copyright.PENANAZrZ1dmzJ6B
332Please respect copyright.PENANARB7YCAzjzP
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/toc332Please respect copyright.PENANAHBz2F0RTp0
332Please respect copyright.PENANAq5cYOMKIJy
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。332Please respect copyright.PENANA8vkm20aJHi
332Please respect copyright.PENANAf9JcnGGC0c
Link:332Please respect copyright.PENANAs1OKZIcDJb
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio332Please respect copyright.PENANAE9RTlXr1MB
332Please respect copyright.PENANAmPK14GsTZE
332Please respect copyright.PENANAIRykgHmnNX
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。332Please respect copyright.PENANApsIfcNQ96a
332Please respect copyright.PENANA4dbvslGNRF
Ref1:https://www.nature.com/articles/s41586-021-03221-y332Please respect copyright.PENANAVwDKYAOngb
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科普專欄–薯不揀單
作者:
薯仔聞茱莉
篇 #184
三十秒科學–身體細胞會否進行浪費舉動?
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