科普專欄–薯不揀單 - 三十秒科學–班馬魚心跳

斑馬魚在成長的時候大多處於相對透明的狀態，其器官生長的過程可以說是亳無保留地呈現在眾人眼前。545Please respect copyright.ＰＥＮＡＮＡMgZORxvZTI
545Please respect copyright.ＰＥＮＡＮＡjt3BmhjeC1
545Please respect copyright.ＰＥＮＡＮＡMJUXaBLjrw
對於專門研究生長機制的科學家來說，班馬魚絕對是一道非常方便用於研究的動物模型。545Please respect copyright.ＰＥＮＡＮＡuJ3Tc8XQoB
545Please respect copyright.ＰＥＮＡＮＡkef8h5rqXL
545Please respect copyright.ＰＥＮＡＮＡ39aD9XbEwm
(圖2)約於受精後24小時，班馬魚的心臟亦將形成，且能收縮膨脹把紅血球送遍全身。545Please respect copyright.ＰＥＮＡＮＡWcs1HXdFzY
545Please respect copyright.ＰＥＮＡＮＡKuSKZ1qsLd
545Please respect copyright.ＰＥＮＡＮＡOdM6WCR0Qs
有科學家嘗試把一氧化碳注進水裡，試圖透過一氧化碳與紅血球的結合，抑制紅血球輸送氧氣的能力，從而探討初生時候的紅血球有甚麼功用。545Please respect copyright.ＰＥＮＡＮＡ3VjVz1MIFd
545Please respect copyright.ＰＥＮＡＮＡkozqJPJ4XO
結果可謂出人意表，就算利用一氧化碳抑制紅血球輸氧的能力，頭5日內，斑馬魚依舊能吸取及耗用氧氣，其耗氧量跟對照組合並無分別。545Please respect copyright.ＰＥＮＡＮＡifCojPGtoX
545Please respect copyright.ＰＥＮＡＮＡaHUHu5M9Hg
545Please respect copyright.ＰＥＮＡＮＡNDZ6GKG10N
(圖3)從圖中可見，隨著生長時數推展，班馬魚的心臟跳動速度亦有所增長，但無論是否注入一氧化碳，其跳動速度亦無太大的分別。545Please respect copyright.ＰＥＮＡＮＡLV0cjFEWvX
545Please respect copyright.ＰＥＮＡＮＡL6puTFEipt
545Please respect copyright.ＰＥＮＡＮＡSwSrNVWksc
這相信是因為頭5日的班馬魚體積非常微細，氧氣能夠透過自然擴散的方式進入班馬魚內部，並不需要紅血球的任何協助。545Please respect copyright.ＰＥＮＡＮＡKc1CQ8vYGM
545Please respect copyright.ＰＥＮＡＮＡqWZsScBGqv
既然頭5日氧氣輸送並不需要紅血球的協助，那為何在受精的第一日後便已發展出撲撲跳的心臟呢?545Please respect copyright.ＰＥＮＡＮＡAfg41yClz7
除了氧氣後，電解質或營養等物質均需透過血液循環系統輸送，它們自然擴散的效率比氧氣為低，需要依靠澎湃的心臟經由血管送到各部位內外。545Please respect copyright.ＰＥＮＡＮＡgpCewMZQcW
545Please respect copyright.ＰＥＮＡＮＡ78Ze6n2m8J
545Please respect copyright.ＰＥＮＡＮＡTnkGbUqCEE
545Please respect copyright.ＰＥＮＡＮＡXfyIvPN0Mu
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。545Please respect copyright.ＰＥＮＡＮＡCKwyKC6XcQ
545Please respect copyright.ＰＥＮＡＮＡm6lIDUZe7a
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/toc545Please respect copyright.ＰＥＮＡＮＡD0eM5mwWar
545Please respect copyright.ＰＥＮＡＮＡqpJE1Rcqzg
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。545Please respect copyright.ＰＥＮＡＮＡhblKhxDjOn
545Please respect copyright.ＰＥＮＡＮＡjPxCSI3TeR
Link:545Please respect copyright.ＰＥＮＡＮＡCutfjxQXSj
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio545Please respect copyright.ＰＥＮＡＮＡxuBFDvkdU8
545Please respect copyright.ＰＥＮＡＮＡeErXGp2m6T
545Please respect copyright.ＰＥＮＡＮＡG8m6AVXHOi
除非Facebook及IG重開侵侵的account，否則我的IG將不會再作更新，只會寄居本土LIHKG及Penana。545Please respect copyright.ＰＥＮＡＮＡUQOa5OCT6d
545Please respect copyright.ＰＥＮＡＮＡcPERyeYalX
Ref1:https://pubmed.ncbi.nlm.nih.gov/8756015/

545Please respect copyright.ＰＥＮＡＮＡ0GMnB3qeMC

ns216.73.216.100da2

介面主題:

字體大小:

行距:

段距:

自動加載下一章