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?1592Please respect copyright.PENANA8m6vBDrqcg1592Please respect copyright.PENANAQsepC7Rzta
1592Please respect copyright.PENANA9gqCgIR8es
答案就在於舌頭上的味蕾感測機制之上。1592Please respect copyright.PENANAj81zZAmOz3
1592Please respect copyright.PENANAo40fAx9aEN
(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。1592Please respect copyright.PENANAToqr8DR7Z8
以感測甜味為例,以下為扼要的簡化過程。1592Please respect copyright.PENANAwIo49N2EVH1592Please respect copyright.PENANAzaWQhu045E
1592Please respect copyright.PENANALzpLq7ZQGw
1.甜味物質與味蕾上的T1R2及T1R3合併。1592Please respect copyright.PENANA7WFBpC8uaK
(Type1 Taste Receptor member 2 and 3)1592Please respect copyright.PENANAPY9SDR3ydM
1592Please respect copyright.PENANAdeFB0HWCTa
2.其後觸發一系列的細胞反應,並產生出鈣離子(Ca2+ ion)。1592Please respect copyright.PENANAEc5jWEfdcQ
1592Please respect copyright.PENANA3fGjqkxejw
3. 鈣離子觸動TRPM5,產生電流。1592Please respect copyright.PENANATtZkD3EAHt
1592Please respect copyright.PENANAvKAu5YvIFp
4. 電流經由神經細胞傳到大腦。1592Please respect copyright.PENANAkeXjE9CZsB
1592Please respect copyright.PENANAimtt36W9DL
5. 大腦分析電流訊息,製造甜味的感覺。1592Please respect copyright.PENANA5itNfotzFI
1592Please respect copyright.PENANAjYibXuQK0e
(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。1592Please respect copyright.PENANArDIhNdIVQE1592Please respect copyright.PENANAUAhNMM33s2
1592Please respect copyright.PENANAodnDBO46Sc
TRPM5除了能夠感測鈣離子後,亦能感測溫度。1592Please respect copyright.PENANAHJBXkrovhv
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。1592Please respect copyright.PENANA5SI5hgn3sg
而電流越強的話,大腦便會轉遞出越甜的感覺。1592Please respect copyright.PENANAMqPkZ4ofd1
1592Please respect copyright.PENANAyEUuzcDhMW
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。1592Please respect copyright.PENANAWfPg1WETRg
1592Please respect copyright.PENANAy1F20t9Noe
1592Please respect copyright.PENANAMF4olTkQ8f
1592Please respect copyright.PENANAiQsVdSceYr
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。1592Please respect copyright.PENANApqCHCUJluq
1592Please respect copyright.PENANAqlzYTvpCTp
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/toc1592Please respect copyright.PENANAXxbWcFlPSP
1592Please respect copyright.PENANAbrky7D6eZX
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。1592Please respect copyright.PENANAME19smBLgY
1592Please respect copyright.PENANAfFCeHkg0yx
Link:1592Please respect copyright.PENANAnBzdj4sYT7
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio1592Please respect copyright.PENANAJAFkWyLH6L
1592Please respect copyright.PENANAxD0rEUzFq0
1592Please respect copyright.PENANA2VONyZna0T
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。1592Please respect copyright.PENANAstBdPHZUxr