長頸鹿是陸上最高的生物,其身體構造亦因此有著與眾不同的地方。309Please respect copyright.PENANAGLsvMeC6wO309Please respect copyright.PENANAgV0P814XID
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(圖2)以血液循環系統方面來說,牠的心臟必須要抵受比其他動物更高的壓力才能把血液輸送到腦部裡頭。309Please respect copyright.PENANAQEjXBEPkCL309Please respect copyright.PENANAQlWC1p3IiW
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同時間,牠亦必須配備完善的機制來調節仰頭吃葉或低頭飲水所帶來的急劇血壓轉變。309Please respect copyright.PENANA3T4m9yDMkF
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若然調節失衡的話,很大機會對其他器官構成威脅及傷害。309Please respect copyright.PENANAOf5o5qJexb
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(圖3)研究發現,長頸鹿的FGFRL1基因出現7道沒能在其他動物(包括人類)尋覓得到的變異。309Please respect copyright.PENANAX8ZqpuIP5C309Please respect copyright.PENANAqH1vCFUcYk
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有科學家把老鼠的FGFRL1基因轉換成長頸鹿的版本,並為老鼠們注射會引致高血壓的藥物。309Please respect copyright.PENANAWG8cht1c2A
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正常老鼠的上下壓在藥物影響下錄得了顯著上升,但擁有長頸鹿版本的老鼠其上下壓並沒有出現顯著的上升。309Please respect copyright.PENANAQBMhaTZ4pv
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(圖4)最為神奇的是,正常老鼠在藥物的影響下所出現的心肌纖維化徵狀,並沒有出現在長頸鹿版本的老鼠身上。309Please respect copyright.PENANAhcbue2Soqq309Please respect copyright.PENANAtibLxQh9xw
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科學家正在嘗試拆解長頸鹿FGFRL1基因版本對心臟等方面所影響的機制,若果能透徹亦剖析整套機制,或許可用作建構抵禦高血壓或其他心臟問題的藥物。309Please respect copyright.PENANA9T570HeoHH
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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。309Please respect copyright.PENANARaSVEMe8fw
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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。309Please respect copyright.PENANAQ26b119sAj
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Link:309Please respect copyright.PENANA6BWwi59RZa
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio309Please respect copyright.PENANAKnWk53M3KS
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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。309Please respect copyright.PENANAypNkgqyRMf
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Ref1:https://advances.sciencemag.org/content/7/12/eabe9459309Please respect copyright.PENANAsUGDMW4VYS