实验表明,K+不能通过磷脂双分子层的人工膜,但如果在人工膜中加

实验表明,K+不能通过磷脂双分子层的人工膜,但如果在人工膜中加入少量缬氨霉素(含12个氨基酸的脂溶性抗生素)时,K+则可以通过膜从高浓度处移向低浓度处。这种物质通过膜的方式是(  )

    A.自由扩散      B.协助扩散      C.主动运输      D.胞吞作用

 

答案

C

 

逆浓度梯度运输为主动运输。

 

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