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In active transport, energy is used to move a solute against its concentration gradient.

Figure 5.13 Primary Active Transport: The Sodium–Potassium Pump. In active transport, energy is used to move a solute against its concentration gradient. For each molecule of ATP used, 2 K + are pumped into the cell and 3 Na + are pumped out of the cell. K +. Outside of cell. Sodium–

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In active transport, energy is used to move a solute against its concentration gradient.

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  1. Figure 5.13 Primary Active Transport: The Sodium–Potassium Pump In active transport, energy is used to move a solute against its concentration gradient. For each molecule of ATP used, 2 K+ are pumped into the cell and 3 Na+ are pumped out of the cell. K+ Outside of cell Sodium– potassium pump Inside of cell Na+

  2. Figure 5.13 Primary Active Transport: The Sodium-Potassium Pump ATP 1. 3 Na+ and 1 ATP bind to the protein “pump.” K+ Extracellular space Cytoplasm Na+

  3. Figure 5.13 Primary Active Transport: The Sodium-Potassium Pump ADP 2. ADP is released, causing a change in the pump’s shape. K+ Extracellular space Pi Cytoplasm

  4. Figure 5.13 Primary Active Transport: The Sodium-Potassium Pump 3. 3 Na+ are released as 2 K+ bind to the pump. Extracellular space Pi Cytoplasm

  5. Figure 5.13 Primary Active Transport: The Sodium-Potassium Pump 4. Pi is released, causing the pump’s shape to change, and releasing 2 K+ Extracellular space Cytoplasm Pi K+

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