Jessi decides to take caffeine pills to stay on top of all of her homework, her job, and her extracurricular activities. however, the resulting overstimulation may be problematic for jessi because

The desired results that Jessi seeks by taking the caffeine pill will only be gotten if the stimulation is in a moderate proportion, however, if the brain is over stimulated, Jessi may become "high" and extremely overwhelmed by the caffeine pill and would not be able to do anything as related to the task that made her take the pill in the first place