Primary Active Transport Secondary Active Transport !!top!!

This one is clever. Instead of using ATP directly, it borrows energy from an existing gradient (usually sodium ions) that was already created by primary transport. Think of this as using a prepaid gift card—the money (energy) was loaded earlier.

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 active transport secondary active transport