一碗同等糖份的紅豆沙,如果將熱紅豆沙和凍紅豆沙比較的話,熱紅豆沙感覺起上來總是會比較甜,究竟為何會這樣呢?1284Please respect copyright.PENANAHHoPpy8ozi1284Please respect copyright.PENANAzNzSp4bRIV
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答案就在於舌頭上的味蕾感測機制之上。1284Please respect copyright.PENANAnLSmqI4x6Z
1284Please respect copyright.PENANAjyoFhyZXSd
(圖2)我們的舌頭上佈滿味蕾細胞,主要功能是為我們感測食物的味道。1284Please respect copyright.PENANAp8tZuqJ3Gc
以感測甜味為例,以下為扼要的簡化過程。1284Please respect copyright.PENANAZD47DD78OX1284Please respect copyright.PENANAwsXtz7OOqs
1284Please respect copyright.PENANAe9YpFySP8R
1.甜味物質與味蕾上的T1R2及T1R3合併。1284Please respect copyright.PENANA3CvvmhH0lL
(Type1 Taste Receptor member 2 and 3)1284Please respect copyright.PENANAOZai66ZMJA
1284Please respect copyright.PENANAwRiUD4imY4
2.其後觸發一系列的細胞反應,並產生出鈣離子(Ca2+ ion)。1284Please respect copyright.PENANAmqXPIz4356
1284Please respect copyright.PENANA9nUc6c2Pvk
3. 鈣離子觸動TRPM5,產生電流。1284Please respect copyright.PENANAhKr553z3r8
1284Please respect copyright.PENANAPx9vW5SBV1
4. 電流經由神經細胞傳到大腦。1284Please respect copyright.PENANAp9jn0SSbia
1284Please respect copyright.PENANAE84mjkvDqb
5. 大腦分析電流訊息,製造甜味的感覺。1284Please respect copyright.PENANAvHd39vPBAO
1284Please respect copyright.PENANA6YpXouGHWb
(圖3)那麼,為何熱紅豆沙會比較甜呢?玄機就在圖中機制的第三步。1284Please respect copyright.PENANAn4gSvHSJIX1284Please respect copyright.PENANA2yFXwt89GP
1284Please respect copyright.PENANAl2JRb5A2cL
TRPM5除了能夠感測鈣離子後,亦能感測溫度。1284Please respect copyright.PENANAxl8jl7yHV4
若然食物溫度提升的話,TRPM5所發出的電流強度便會有所增長。1284Please respect copyright.PENANAvYrC8qPGr7
而電流越強的話,大腦便會轉遞出越甜的感覺。1284Please respect copyright.PENANA1T64nBkTxm
1284Please respect copyright.PENANAGQlnZRAaIQ
而正正就是因為這個緣故,儘管糖份一樣,熱紅豆沙食起上來會比凍紅豆沙感覺起上來會比較甜。1284Please respect copyright.PENANA5xpbaA6i5p
1284Please respect copyright.PENANAw2BLhAPo98
1284Please respect copyright.PENANAeNf0VDQ2Hl
1284Please respect copyright.PENANAuP0cDEI3YD
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。1284Please respect copyright.PENANAGMG7okDkZj
1284Please respect copyright.PENANAWO0iDGAuLa
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/toc1284Please respect copyright.PENANA1EaG4EDH4x
1284Please respect copyright.PENANALNyuj0Bf3n
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。1284Please respect copyright.PENANAdaaNdRV37D
1284Please respect copyright.PENANAD4FCWS5gxg
Link:1284Please respect copyright.PENANAxXvThIv32O
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio1284Please respect copyright.PENANA7AXTdiv77Q
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1284Please respect copyright.PENANAgDRZxZOT0Y
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。1284Please respect copyright.PENANAAy6JjM5u0u
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深入淺出–為何熱紅豆沙食起上來會比凍紅豆沙感覺更甜
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