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Gaokao Biology Practice Question

物质输入和输出细胞都需要经过细胞膜。下列有关人体内物质跨膜运输的叙述,正确的是( )

  1. A.乙醇是有机物,不能通过自由扩散方式跨膜进入细胞
  2. B.血浆中的K+进入红细胞时需要载体蛋白并消耗ATP
  3. C.抗体在浆细胞内合成时消耗能量,其分泌过程不耗能
  4. D.葡萄糖可通过主动运输但不能通过协助扩散进入细胞

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