Which of the following is most likely to move through the cell membrane by facilitated diffusion?

The choices are not given so it is best to discuss what is a facilitated diffusion. It is a type of diffusion where  it involves a spontaneous passive transport of molecules or ions across a biological membrane via specific transmembrane integral proteins. It is a process that requires the supply of added energy.

Atp is is our little "pocket" of energy. of course, if you have too little, then it means you have too little energy, and you'll pass out. the way to not have enough, is to have no energy sources (glucose, fats, proteins). you can't have too many atp molecules. cycles like the krebs cycle produce it, but if you have too much of any substrate (or too little for that matter), the cycle stops and atp is no longer made (it stops until substrate levels are such that the process can go on). in any case, this is unlikely since atp is constantly hydrolyzed and remade, even while you're asleep. you won't have too much. if you have zero, you are dead or dying.

You need to give use the answers