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。606Please respect copyright.ＰＥＮＡＮＡMtpwyzvzzc
606Please respect copyright.ＰＥＮＡＮＡVUIyX6fvh8
606Please respect copyright.ＰＥＮＡＮＡ0JrpscHE4B
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。606Please respect copyright.ＰＥＮＡＮＡw7xtMJmILq
606Please respect copyright.ＰＥＮＡＮＡ2wEikTiPJW
606Please respect copyright.ＰＥＮＡＮＡsSE0KnxUTY
(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。606Please respect copyright.ＰＥＮＡＮＡlYOXhb5CGf
606Please respect copyright.ＰＥＮＡＮＡS7ppGARQNf
606Please respect copyright.ＰＥＮＡＮＡdvoBipb81S
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。606Please respect copyright.ＰＥＮＡＮＡ0QvnCrUjOz
606Please respect copyright.ＰＥＮＡＮＡ96dqMwTY8d
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。606Please respect copyright.ＰＥＮＡＮＡdJkyBu0jFN
606Please respect copyright.ＰＥＮＡＮＡOySK55z08D
606Please respect copyright.ＰＥＮＡＮＡ0qpBdhBWAH
(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。606Please respect copyright.ＰＥＮＡＮＡIegxDX1BlV
606Please respect copyright.ＰＥＮＡＮＡVkwbLWgKxJ
606Please respect copyright.ＰＥＮＡＮＡKtQyAjs4Ht
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。606Please respect copyright.ＰＥＮＡＮＡvnrayWhQmo
606Please respect copyright.ＰＥＮＡＮＡuKMmCpgiO2
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?606Please respect copyright.ＰＥＮＡＮＡNQHGmDKoS3
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。606Please respect copyright.ＰＥＮＡＮＡqf2GnqG3cO
606Please respect copyright.ＰＥＮＡＮＡf4CBNYukMW
606Please respect copyright.ＰＥＮＡＮＡRJ4p8bzul0
606Please respect copyright.ＰＥＮＡＮＡXMUYqFIjQx
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。606Please respect copyright.ＰＥＮＡＮＡxbnFCOk9fm
606Please respect copyright.ＰＥＮＡＮＡXD6CSV4hn0
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/toc606Please respect copyright.ＰＥＮＡＮＡF4KRNwF6v8
606Please respect copyright.ＰＥＮＡＮＡqcPk7BK7gp
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。606Please respect copyright.ＰＥＮＡＮＡNYoGrP93nl
606Please respect copyright.ＰＥＮＡＮＡG7thFhsC35
Link:606Please respect copyright.ＰＥＮＡＮＡYCmzfzjM0c
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio606Please respect copyright.ＰＥＮＡＮＡBescddQjYi
606Please respect copyright.ＰＥＮＡＮＡUi5G35yNdb
606Please respect copyright.ＰＥＮＡＮＡdq6UWWHqcW
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。606Please respect copyright.ＰＥＮＡＮＡ1Qq9FfCriz
606Please respect copyright.ＰＥＮＡＮＡXoum8CRJQA
Ref1:https://pubmed.ncbi.nlm.nih.gov/8756015/

606Please respect copyright.ＰＥＮＡＮＡ6nVmcVOKyt

ns216.73.216.206da2

介面主題:

字體大小:

行距:

段距:

自動加載下一章