Define Active Transport 〈90% TOP〉

This pump is running constantly in every nerve cell in your brain. It pumps of the cell and 2 potassium ions (K+) into the cell, both against their gradients.

Roots use active transport to pull minerals and salts out of the soil, even when the concentration in the soil is much lower than inside the plant. Active Transport vs. Passive Transport: A Quick Comparison Active Transport Passive Transport Energy Required? Direction Against the gradient (Low to High) With the gradient (High to Low) Mechanism Protein Pumps / Vesicles Diffusion / Osmosis Analogy Pushing a bike uphill Coasting downhill define active transport