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.ＰＥＮＡＮＡOTZZGTsRTX
1587Please respect copyright.ＰＥＮＡＮＡylerFqltc6
1587Please respect copyright.ＰＥＮＡＮＡndzO6L48tR
答案就在於舌頭上的味蕾感測機制之上。1587Please respect copyright.ＰＥＮＡＮＡ6CE8cnxzs1
1587Please respect copyright.ＰＥＮＡＮＡwvqB4hwyzu
（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.ＰＥＮＡＮＡz89Io1v7bB
以感測甜味為例，以下為扼要的簡化過程。1587Please respect copyright.ＰＥＮＡＮＡLjv9IG4g3i
1587Please respect copyright.ＰＥＮＡＮＡkKffoyyB4y
1587Please respect copyright.ＰＥＮＡＮＡyHqB4uJbCe
1.甜味物質與味蕾上的T1R2及T1R3合併。1587Please respect copyright.ＰＥＮＡＮＡXtGqdAeT45
(Type1 Taste Receptor member 2 and 3)1587Please respect copyright.ＰＥＮＡＮＡOTlDK6ZwKp
1587Please respect copyright.ＰＥＮＡＮＡ1GSOSMQw5d
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.ＰＥＮＡＮＡqaValwBLCu
1587Please respect copyright.ＰＥＮＡＮＡEqp8kFiJto
3. 鈣離子觸動TRPM5，產生電流。1587Please respect copyright.ＰＥＮＡＮＡjjDxTNaJqw
1587Please respect copyright.ＰＥＮＡＮＡXg8zLuFyFj
4. 電流經由神經細胞傳到大腦。1587Please respect copyright.ＰＥＮＡＮＡGhge6RFJev
1587Please respect copyright.ＰＥＮＡＮＡ0c0FYVDlx7
5. 大腦分析電流訊息，製造甜味的感覺。1587Please respect copyright.ＰＥＮＡＮＡHWJaOLjtwJ
1587Please respect copyright.ＰＥＮＡＮＡkEQcPqO2bQ
（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.ＰＥＮＡＮＡ4H99uMawPt
1587Please respect copyright.ＰＥＮＡＮＡWxQ4eSggt7
1587Please respect copyright.ＰＥＮＡＮＡtVn823QWO1
TRPM5除了能夠感測鈣離子後，亦能感測溫度。1587Please respect copyright.ＰＥＮＡＮＡHwDNu5XNWc
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.ＰＥＮＡＮＡgnKAYr8urK
而電流越強的話，大腦便會轉遞出越甜的感覺。1587Please respect copyright.ＰＥＮＡＮＡ17XwbCDMjG
1587Please respect copyright.ＰＥＮＡＮＡToQOO0qSDW
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.ＰＥＮＡＮＡM8cdnG5BCY
1587Please respect copyright.ＰＥＮＡＮＡPhOq6t2HCB
1587Please respect copyright.ＰＥＮＡＮＡsjIuUze5iD
1587Please respect copyright.ＰＥＮＡＮＡ2uYeJw47MY
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.ＰＥＮＡＮＡVFkPbK2h83
1587Please respect copyright.ＰＥＮＡＮＡJ7nzZJiIZt
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.ＰＥＮＡＮＡgcjFWdHxrg
1587Please respect copyright.ＰＥＮＡＮＡHc7d0ES2xP
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.ＰＥＮＡＮＡBrGBMjMnr8
1587Please respect copyright.ＰＥＮＡＮＡCcgjSnEZhO
Link:1587Please respect copyright.ＰＥＮＡＮＡmuvJ5nTPq4
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio1587Please respect copyright.ＰＥＮＡＮＡmC1nES0Gay
1587Please respect copyright.ＰＥＮＡＮＡUf9emZRPmQ
1587Please respect copyright.ＰＥＮＡＮＡ8ClKqpKlgv
有興趣接收科學資訊的話，歡迎follow IG: potatopigtongue。1587Please respect copyright.ＰＥＮＡＮＡiVqgTJFtbl
Penana
search
登入arrow_drop_down
註冊arrow_drop_down
