BRAINCAKESodium-Potassium Pump
The sodium-potassium pump is a carrier protein that actively transports sodium ions out of the cell and simultaneously transports potassium ions into the cell.
The initial configuration of the carrier protein is such that binding sites on the inside of the cell are exposed and binding sites on the outside are inaccessible and there is no continuous passage from one side to another.
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Key terms in this lesson
- hydrolysis
- The breaking of a covalent bond within a molecule using a water molecule.
- ATP
- Adenosine triphosphate, a nucleotide that acts as the immediate energy source in cells, releasing energy when hydrolysed to ADP and phosphate.
More in Transport Across Cell Membranes
- Osmosis
- Osmosis in Animal Cells
- Osmosis in Plant Cells
- Active Transport
- Increasing the Rate of Movement across a Membrane
- Absorption in the Ileum
- Co-transport in Absorption
- Oral Rehydration Therapy
All 22 lessons in Transport Across Cell Membranes · All AQA AS-level Biology topics