人、狗、鼠、兔均是恆溫動物,意思即是他們需要動用從新陳代謝中所獲取的能量來保持恆常體溫。349Please respect copyright.PENANAbqi5ed0i8W349Please respect copyright.PENANAcvapdtFL84
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在炎熱的天氣下,人及狗均能依靠流汗及喘氣作散熱的手段。349Please respect copyright.PENANAym1uiYa5wh
但鼠及兔皮下並沒有汗腺的關係,牠們沒有流汗的能力,同時亦沒有喘氣的習性。349Please respect copyright.PENANACgKH8qZGQp
349Please respect copyright.PENANANhl6jfF1gG
(圖2)在行為方面,鼠及兔只好依靠躲藏或擺出不同的身體姿勢作散溫或保暖用途。349Please respect copyright.PENANADPGCeRG8Fv349Please respect copyright.PENANAJebsER7Oax
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生理方面,鼠及兔能透過豎毛(Piloerection),亦即是毛管戙來阻隔寒氣入侵,又或是擴張血管(Vasodilation)來加快散熱效能。349Please respect copyright.PENANAyg7oBWmQMl
349Please respect copyright.PENANAqDR3e23d9X
(圖3)老鼠的尾巴約佔全身皮膚面積5%左右,但約17%的體溫調節功能均是透過尾巴的血管擴張及收縮來控制。349Please respect copyright.PENANAs15JwU3ibh349Please respect copyright.PENANAWBzRHzKey7
349Please respect copyright.PENANApiYdN0Fqiw
至於兔仔的耳廓(Auricle),其表面的血管亦跟老鼠尾巴帶有著調節溫度的功能。349Please respect copyright.PENANAO8VjQYZwVH
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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。349Please respect copyright.PENANAjbz4Ct88wL
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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/toc349Please respect copyright.PENANAXRlv4ylaqc
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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。349Please respect copyright.PENANAReKYXwb9iK
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Link:349Please respect copyright.PENANATkjHrWYqhF
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio349Please respect copyright.PENANA0CWkc4HlMC
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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。349Please respect copyright.PENANA8UiXGtvGhJ
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篇 #176
三十秒科學–老鼠及兔仔會否流汗?
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