Primary Secondary Active Transport !new! -

| | Primary Active Transport | Secondary Active Transport | | --- | --- | --- | | | Direct ATP energy | Existing electrochemical gradient | | Transport Mechanism | Pumps (e.g., Na+/K+-ATPase) | Cotransport proteins (e.g., symporters, antiporters) | | Examples | Sodium-potassium pump, proton pump | Sodium-glucose cotransport, amino acid transport |

Secondary active transport is a bit more clever. It doesn't use ATP directly. Instead, it hitches a ride on the energy created by primary active transport. How it Works primary secondary active transport

Active transport: primary & secondary overview (article) | Khan Academy | | Primary Active Transport | Secondary Active

Na+/K+cap N a raised to the positive power / cap K raised to the positive power ATPase). It uses ATP to pump three Na+cap N a raised to the positive power ions out of the cell and two K+cap K raised to the positive power ions into the cell, both against their gradients. How it Works Active transport: primary & secondary