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。333Please respect copyright.PENANAOT6ZmWRFB8
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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。333Please respect copyright.PENANASGqkhxP3l8
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。333Please respect copyright.PENANATXbGgRxytF
333Please respect copyright.PENANAw2PcN8eyCx
(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。333Please respect copyright.PENANA5k2SjZi079
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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。333Please respect copyright.PENANAKh0X7vepW8
333Please respect copyright.PENANAl6tM5zFpi4
(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。333Please respect copyright.PENANAA6FOARWc6r
333Please respect copyright.PENANAPgvUZcRfPJ
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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。333Please respect copyright.PENANAGBK2C4hc6w
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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。333Please respect copyright.PENANAI1n3FupChv
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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/toc333Please respect copyright.PENANAW1OyMG9bw3
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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。333Please respect copyright.PENANAzGsJQuLBuB
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Link:333Please respect copyright.PENANACnvM1NdhN2
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio333Please respect copyright.PENANAJmGHLofrti
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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。333Please respect copyright.PENANAVLKB1Bxvmp
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科普專欄–薯不揀單
作者:
薯仔聞茱莉
篇 #176
三十秒科學–老鼠及兔仔會否流汗?
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