Secondary active transport does not use ATP directly. Instead, it relies on the created by primary active transport.
In the bustling metropolis of , everything depends on the movement of "Cargo" (ions and molecules) across the Great Border (the cell membrane). This is the story of two different delivery systems: the Elite Engine and the Clever Hitchhiker . 1. Primary Active Transport: The Elite Engine
) into the cell. By doing this, it creates a massive concentration imbalance. 2. Secondary Active Transport: The Gradient Harvest
Primary vs. Secondary Active Transport: Understanding the Energy of Life
Both molecules move in the direction.
Primary active transport uses chemical energy—usually in the form of —to move molecules across a membrane.
pump) to maintain a steady gradient, the cell creates a universal "battery" that can power dozens of different secondary transporters simultaneously.