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渗透调节是指生物体为维持体内体液的含水量以及电解质浓度而对体液的渗透压进行调节。[1]水生和陆生生物的体液必须保持适当的溶质浓度和含水量。例如植物在干旱的环境下失水,植物就通过代谢活动提高细胞内溶质浓度,降低水势,从而从外界的介质中继续吸水。[2]
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