Secondary active transport, also known as indirect active transport, involves the use of an electrochemical gradient to transport molecules across the cell membrane. In this process, the energy from the movement of one molecule down its concentration gradient is used to transport another molecule against its concentration gradient.
The transport of a molecule against its concentration gradient, driven indirectly by the energy stored in an electrochemical gradient (usually of Na⁺ or H⁺) created by primary active transport. primary and secondary active transport
Example: The in the gut uses the inward flow of Sodium to "pull" Glucose into the cell, even when glucose levels are already high inside. Secondary active transport, also known as indirect active
3 Na⁺ out, 2 K⁺ in per ATP. This creates an electrochemical gradient (inside negative relative to outside). Secondary active transport