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淡水鱼进入大海会怎么样
更新时间: 2020-07-13 00:00:00  

淡水鱼进入大海会脱水致死。

原因:根据渗透压原理,海水鱼鱼体组织中的水,将不断地从鳃和体表向外渗出。为了保持体内水分平衡,淡水鱼便吞食大量海水,以弥补体内的失水。而由于吞食海水,使得鱼类体内的盐分增加,如此,淡水鱼鱼体组织的含盐浓度比外界淡水的含盐浓度要高,根据渗透压原理,外界水将不断地进入鱼体,因此淡水鱼会通过肾脏将过多的水分排出体外。

故淡水鱼因适应不了高浓度的盐分,会因渗透作用脱水而死。

关键词: 淡水鱼 进入 大海 怎么样

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