In what other ways could studying dog diseases be beneficial

It is always beneficial to study the diseases of other animals because many of these diseases can be transmitted to humans as well. It's also essential in order to save the lives of dogs.

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.

I'm guessing that it's referencing the common folk or people of town or the people who are in the middle of the social and economical hierarchy