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？1546Please respect copyright.ＰＥＮＡＮＡIV1LiI9dzZ
1546Please respect copyright.ＰＥＮＡＮＡNJyxfqRiEl
1546Please respect copyright.ＰＥＮＡＮＡKAyoNWcnQn
答案就在於舌頭上的味蕾感測機制之上。1546Please respect copyright.ＰＥＮＡＮＡzSFbFbrAJM
1546Please respect copyright.ＰＥＮＡＮＡwGyWZLIR9W
（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。1546Please respect copyright.ＰＥＮＡＮＡEQJg1xxJyJ
以感測甜味為例，以下為扼要的簡化過程。1546Please respect copyright.ＰＥＮＡＮＡ1YDlcg3CBy
1546Please respect copyright.ＰＥＮＡＮＡpMEBLRsJuX
1546Please respect copyright.ＰＥＮＡＮＡCyL2LedaVu
1.甜味物質與味蕾上的T1R2及T1R3合併。1546Please respect copyright.ＰＥＮＡＮＡsf2MrYilkI
(Type1 Taste Receptor member 2 and 3)1546Please respect copyright.ＰＥＮＡＮＡHhJtJ5pmBQ
1546Please respect copyright.ＰＥＮＡＮＡDRH9443gpL
2.其後觸發一系列的細胞反應，並產生出鈣離子(Ca2+ ion)。1546Please respect copyright.ＰＥＮＡＮＡ2NbPiH478U
1546Please respect copyright.ＰＥＮＡＮＡNXuKcQv7C1
3. 鈣離子觸動TRPM5，產生電流。1546Please respect copyright.ＰＥＮＡＮＡDLl2VVnFck
1546Please respect copyright.ＰＥＮＡＮＡ5XilUMSblX
4. 電流經由神經細胞傳到大腦。1546Please respect copyright.ＰＥＮＡＮＡ2A3kw3ysN0
1546Please respect copyright.ＰＥＮＡＮＡ4x6myqJCFJ
5. 大腦分析電流訊息，製造甜味的感覺。1546Please respect copyright.ＰＥＮＡＮＡjFyNPmJcJC
1546Please respect copyright.ＰＥＮＡＮＡ2M5D78h5FW
（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。1546Please respect copyright.ＰＥＮＡＮＡvnHh0AYyRE
1546Please respect copyright.ＰＥＮＡＮＡrYEmrbDppa
1546Please respect copyright.ＰＥＮＡＮＡIejTyrvRBf
TRPM5除了能夠感測鈣離子後，亦能感測溫度。1546Please respect copyright.ＰＥＮＡＮＡ2fpxhfeASk
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。1546Please respect copyright.ＰＥＮＡＮＡGE4IiWsCy5
而電流越強的話，大腦便會轉遞出越甜的感覺。1546Please respect copyright.ＰＥＮＡＮＡmnuLO2IYq7
1546Please respect copyright.ＰＥＮＡＮＡ7zrDwH1Uyz
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。1546Please respect copyright.ＰＥＮＡＮＡXHz1LFptn2
1546Please respect copyright.ＰＥＮＡＮＡS21vM8y8Mu
1546Please respect copyright.ＰＥＮＡＮＡoh9tbGRcUr
1546Please respect copyright.ＰＥＮＡＮＡ0hWOnYG1ng
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。1546Please respect copyright.ＰＥＮＡＮＡUzicn4cb3z
1546Please respect copyright.ＰＥＮＡＮＡv3QElP28RR
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/toc1546Please respect copyright.ＰＥＮＡＮＡItl6Kane5s
1546Please respect copyright.ＰＥＮＡＮＡu6DI0zd3ji
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。1546Please respect copyright.ＰＥＮＡＮＡhxPgC9b2X0
1546Please respect copyright.ＰＥＮＡＮＡ1y60U47LN8
Link:1546Please respect copyright.ＰＥＮＡＮＡslifmbGX0Z
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio1546Please respect copyright.ＰＥＮＡＮＡQXFeN2PJ4C
1546Please respect copyright.ＰＥＮＡＮＡco1zpsE6rH
1546Please respect copyright.ＰＥＮＡＮＡ4Umq3vV2y4
有興趣接收科學資訊的話，歡迎follow IG: potatopigtongue。1546Please respect copyright.ＰＥＮＡＮＡntaWZpEH2L
Penana
search
登入arrow_drop_down
註冊arrow_drop_down
