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。775Please respect copyright.ＰＥＮＡＮＡwmxSRAzCNq
775Please respect copyright.ＰＥＮＡＮＡnSmMiNMuEU
775Please respect copyright.ＰＥＮＡＮＡp5IDcoedEy
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。775Please respect copyright.ＰＥＮＡＮＡUa8yFj3nbE
775Please respect copyright.ＰＥＮＡＮＡRvU40ICXoM
775Please respect copyright.ＰＥＮＡＮＡe0vANcCtEy
(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。775Please respect copyright.ＰＥＮＡＮＡ50YE9kgwx1
775Please respect copyright.ＰＥＮＡＮＡCBlpXzIUSA
775Please respect copyright.ＰＥＮＡＮＡZsi7uYpP3c
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。775Please respect copyright.ＰＥＮＡＮＡ4PGPdEw9sT
775Please respect copyright.ＰＥＮＡＮＡq8MCP4vMnc
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。775Please respect copyright.ＰＥＮＡＮＡV93KF9Dhbt
775Please respect copyright.ＰＥＮＡＮＡcskIhdoHyB
775Please respect copyright.ＰＥＮＡＮＡKtjX9nBY0V
(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。775Please respect copyright.ＰＥＮＡＮＡDJabS301Lw
775Please respect copyright.ＰＥＮＡＮＡ6aoCO7Hu84
775Please respect copyright.ＰＥＮＡＮＡToRfN2HNck
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。775Please respect copyright.ＰＥＮＡＮＡ8BX7Y5aR5Y
775Please respect copyright.ＰＥＮＡＮＡUP8P8Qh4m1
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?775Please respect copyright.ＰＥＮＡＮＡDxVP9WHmYo
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。775Please respect copyright.ＰＥＮＡＮＡ3cIObWMa4b
775Please respect copyright.ＰＥＮＡＮＡz7L84JFGuX
775Please respect copyright.ＰＥＮＡＮＡjQCrIP8BfT
775Please respect copyright.ＰＥＮＡＮＡcG7Pu6gr1G
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。775Please respect copyright.ＰＥＮＡＮＡZVIFC0qPCN
775Please respect copyright.ＰＥＮＡＮＡpGvQVrxrAs
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/toc775Please respect copyright.ＰＥＮＡＮＡ3sUFZs2oyX
775Please respect copyright.ＰＥＮＡＮＡiy9yJWVE9j
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。775Please respect copyright.ＰＥＮＡＮＡzirvc4KLLV
775Please respect copyright.ＰＥＮＡＮＡL9e0wOXc4I
Link:775Please respect copyright.ＰＥＮＡＮＡ3GnxB1EEE6
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio775Please respect copyright.ＰＥＮＡＮＡD0dgaTRAvV
775Please respect copyright.ＰＥＮＡＮＡW7vVOOmtz1
775Please respect copyright.ＰＥＮＡＮＡMr9PDymOsC
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。775Please respect copyright.ＰＥＮＡＮＡwMDv3nMZnj
775Please respect copyright.ＰＥＮＡＮＡ9CDUqFklSb
Ref1:https://pubmed.ncbi.nlm.nih.gov/8756015/

775Please respect copyright.ＰＥＮＡＮＡSgx6IljgUJ

ns216.73.216.217da2

Reading Theme:

Font Size:

Line Spacing:

Paragraph Spacing:

Load the next issue automatically