What Active Transport Free Today

What Active Transport Free Today

Introduction

| Feature | Active Transport | Passive Transport (Diffusion/Osmosis) | | :--- | :--- | :--- | | Direction | Low → High (against gradient) | High → Low (down gradient) | | Energy Required | Yes (ATP) | No | | Protein Carriers | Yes (pumps) | Maybe (channels or carriers for facilitated diffusion) | | Equilibrium | Creates or maintains disequilibrium | Reaches equilibrium | what active transport

is the movement of molecules or ions across a cell membrane against their concentration gradient (from an area of low concentration to an area of high concentration). Because this movement opposes the natural tendency of diffusion, it requires an input of chemical energy . Introduction | Feature | Active Transport | Passive