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2. What happens when the pump is phosphorylated?

  • It changes shape, decreasing the affinity for the Na+ ions, expelling them outside of the cell
  • Na+ ions bind tighter to the pump

3. What happens after the Na+ ions are expelled from the pump?

  • The new shape gives a higher binding affinity to K+ ions, 2 can fit into the pump from the extracellular side
  • K+ are released as well

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