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Sodium/Potassium Pump

By Levi Clancy for Student Reader on

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The Sodium/Potassium Pump puts Na+ outside the cell and K+ inside the cell.

  • 3Na+ mols inside bind to receptor

  • This stimulates phosphorylation of receptor by ATP.

  • This alters receptor shape, shape change dumps Na+ onto inside.

  • Open receptors bind 2K+ ions outside.

  • K+ binding triggers phosphate release.

  • This restores original conformation.

  • K+ released inside, NA+ sites become available.

  • Net: 1 ATP lost; 3 Na+ outside; 2 K+ inside.