目次:Cell/membrane

1. Cell/membrane
   1. Cell/membrane/membrane transport/diffusion
   2. Cell/membrane/membrane transport/substances that diffuse through membrane
   3. Cell/membrane/membrane transport/substances that diffuse through membrane/lipid affinity
   4. Cell/membrane/membrane transport/membrane transport protein
   5. Cell/membrane/membrane transport/membrane transport protein/channels
   6. Cell/membrane/membrane transport/membrane transport protein/transporter
   7. Cell/membrane/membrane transport/membrane transport protein/pump
   8. Cell/membrane/membrane transport/membrane transport protein/channels/specificity
   9. Cell/membrane/membrane transport/membrane transport protein/channels/open, close
   10. Cell/membrane/membrane transport/ATP energy