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?1587Please respect copyright.PENANAzzQNpqXn5E1587Please respect copyright.PENANAlaABVGipZD
1587Please respect copyright.PENANA45FLxECZRl
答案就在於舌頭上的味蕾感測機制之上。1587Please respect copyright.PENANApVDE6Tq2OW
1587Please respect copyright.PENANAq2UPMtMlaZ
(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。1587Please respect copyright.PENANASexP7irQiD
以感測甜味為例,以下為扼要的簡化過程。1587Please respect copyright.PENANA0OLB10JmP01587Please respect copyright.PENANAzEtE4kw83C
1587Please respect copyright.PENANA5zApPOzOBI
1.甜味物質與味蕾上的T1R2及T1R3合併。1587Please respect copyright.PENANAQvMjWVQU2k
(Type1 Taste Receptor member 2 and 3)1587Please respect copyright.PENANAGUsmdTjgA5
1587Please respect copyright.PENANAAtp8ydhXmm
2.其後觸發一系列的細胞反應,並產生出鈣離子(Ca2+ ion)。1587Please respect copyright.PENANAlQ1mqcQ3wC
1587Please respect copyright.PENANAX51VNKjO3V
3. 鈣離子觸動TRPM5,產生電流。1587Please respect copyright.PENANAjJDYO5FyiR
1587Please respect copyright.PENANA28zDPyOeoS
4. 電流經由神經細胞傳到大腦。1587Please respect copyright.PENANA8kliZo5vWl
1587Please respect copyright.PENANAJ3vPcmanHt
5. 大腦分析電流訊息,製造甜味的感覺。1587Please respect copyright.PENANAW8HVY1JfmV
1587Please respect copyright.PENANAAS8w7UeyS2
(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。1587Please respect copyright.PENANABmuFTHV8621587Please respect copyright.PENANAR4gisf9Yzn
1587Please respect copyright.PENANAl3WjwfFm9x
TRPM5除了能夠感測鈣離子後,亦能感測溫度。1587Please respect copyright.PENANALB75xdKpDy
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。1587Please respect copyright.PENANAsp5MpaSKMm
而電流越強的話,大腦便會轉遞出越甜的感覺。1587Please respect copyright.PENANADdHulHTnpq
1587Please respect copyright.PENANAUPfN5Nkyup
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。1587Please respect copyright.PENANAY5R4DZbPD8
1587Please respect copyright.PENANAJbcwIWT7lo
1587Please respect copyright.PENANAGqVf1lMW5p
1587Please respect copyright.PENANAbernHURnlz
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。1587Please respect copyright.PENANA7LFF1B5TuZ
1587Please respect copyright.PENANAPxuIWxwheV
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/toc1587Please respect copyright.PENANA43cHd1nfke
1587Please respect copyright.PENANA03y7S7LUNq
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。1587Please respect copyright.PENANARyzvZ7K5We
1587Please respect copyright.PENANAaunM8egsXT
Link:1587Please respect copyright.PENANA0A1ZmoHfvw
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio1587Please respect copyright.PENANAUBQpucy8u7
1587Please respect copyright.PENANAanrpGliJ8Z
1587Please respect copyright.PENANAVywyZr2vzA
有興趣接收科學資訊的話,歡迎follow IG: potatopigtongue。1587Please respect copyright.PENANAA6kt3k9MZ2
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篇 #34
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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