Define Active Transport < 99% High-Quality >

Because this movement is "uphill" (moving from low to high), it cannot happen spontaneously. The cell must expend energy, usually in the form of , to power the process.

Active transport is the energy-dependent movement of molecules from a low-concentration area to a high-concentration area, facilitated by protein pumps that work against the natural tendency toward equilibrium. define active transport

Think of it like a water wheel. You didn't lift the water to the top of the wheel (primary transport did that). You are just riding the water as it falls back down. Because this movement is "uphill" (moving from low