Categories of Transport Across the Plasma membrane May also be categorized by their energy requirements Passive transport > Net movement down a concentration gradient >does not need atp Active transport >Net movement against a concentration gradient >needs ATP25 Categories of Transport Across the Plasma Membrane ➢ May also be categorized by their energy requirements: ➢Passive transport: ➢Net movement down a concentration gradient ➢does not need ATP ➢Active transport: ➢Net movement against a concentration gradient ➢needs ATP