Let’s break that down. Secondary active transport does not directly hydrolyze ATP. Instead, it harnesses the energy stored in an electrochemical gradient—typically a sodium (Na⁺) or hydrogen (H⁺) gradient—to move another molecule against its concentration gradient. The Longer Explanation: Indirect Use of ATP If secondary active transport doesn’t use ATP directly, where does the energy come from?
It’s a fair question. Primary active transport (like the sodium-potassium pump) clearly uses ATP. Passive transport uses no energy at all. Secondary active transport sits in the middle—and that’s where the confusion begins. does secondary active transport use atp
Here’s the short answer: However, it indirectly depends on ATP. Let’s break that down