I want to know the answer to the following question:
Such chemicals do what to the firing of the brain's neurons?
All the background I'm provided with is that "Such chemicals will either excite or inhibit the firing of neurons in the brain, with a greater firing rate allowing the brain to register the occurrence of more events within a given interval (speed up time) and a decreased firing rate reducing the brain's capacity to distinguish events occurring within a given interval (slow down time).". Is that enough to answer the question?