kinsda
Lv 7
kinsda asked in 科學其他:科學 · 1 decade ago

””急””有關細胞的問題......20點

Answer the following questions:1, What will happen to a red blood cell when you put it in a hypotonic solution?2, What is the major difference between facilitate transport and active transport?

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  • 1 decade ago
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    1.若環境液體濃度比細胞內濃度低時(低張溶液),水分會移到細胞內,使細胞脹破.

    2.facilitate "diffusion" and active transport

    (1)促進型擴散facilitate diffusion

    屬於被動運輸(passive transport),不需能量,小型以及帶電中性的分子可以順著濃度梯度移動,例如葡萄糖可藉此方式進入細胞.

    (2)主動運輸active transport

    小離子,帶電荷小分子以及大分子借助橫跨脂雙層膜的運輸蛋白質,在耗能的情況下,逆著濃度梯度移動.例如:鈉_鉀幫浦可維持細胞內高濃度的鉀及低濃度的鈉,維持體內恆定.

    Source(s): 生物學得分眼(建強出版社)
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  • Wolf
    Lv 6
    1 decade ago

    1, What will happen to a red blood cell when you put it in a hypotonic solution?脹大甚至脹破2, What is the major difference between facilitate transport and active transport? facilitate transport 不額外耗能  active transport 要

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