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Sodium Potassium Pump
Mechanism in membrane actively transporting Na out & K into cell to maintain resting membrane potential
Process
1. Bind 3 Na & ATP molecule
2. ATP split & channel change shape
4. Na released
5. Bind 2 K
6. Phosphate release & channel change shape
7. K released
Na
Slightly permeable
Limited leakage channels
K
Highly permeable
Many leakage channels