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Some help please

  1. Nov 9, 2005 #1
    this is a figure from a neuron
    can anyone explain why not sodium ions cross the cell membrane?
  2. jcsd
  3. Nov 9, 2005 #2
    "http://www.bris.ac.uk/synaptic/public/basics_ch1_2.html" [Broken]
    This is a good site at explaining how neurons work; complete with animations.

    Last edited by a moderator: Apr 21, 2017 at 9:35 PM
  4. Nov 14, 2005 #3
    perhaps you can search Na/K ATPase
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