While researchers have discovered that there are an excessive number of receptor sites for dopamine in schizophrenia patient's brains, it is not the only involved in schizophrenia?

cats ; snakes

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.