尔雅 智慧树 mooc

Channelproteins(suchasthevoltagegatedNachannel)transportionsmuchfasterthancarrierproteins(suchastheNaKpump)，buttheycannotbecoupledtoanenergysource;therefore，transportmediatedbychannelsisalwayspassive.

  尔雅 智慧树 mooc


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