Primary Active Transport And Secondary Active Transport !!install!!

Both the "driver" ion and the "passenger" molecule move in the .

Imagine a crowded room (high concentration) and an empty hallway (low concentration). People naturally rush from the room to the hallway. Now, imagine a bouncer who opens the door only if someone drags a VIP guest with them into the hallway. The rush of people (the gradient) provides the energy to move the VIP (the target molecule) against their will. primary active transport and secondary active transport