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


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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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slide1

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+

slide2

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+

slide3

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

slide4

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

slide5

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+