How do we send signals between the three main components of the automatic control system?

We use our nervous system and endocrine system. the nervous system sends very fast and precise electrical impulses through nerves which allows us to respond to things very quickly such as when we touch a sharp object. the endocrine system relies on hormones(small chemicals released into the bloodstream). Although they travel around the entire body they only affect certain cells that have the right receptors. the endocrine system is slower, longer-lasting and more generalised than the nervous system.