Source: The U.S. Department of State. The Southwest differs from the adjoining Midwest in weather (drier), population (less dense), and ethnicity (strong Spanish-American and Native-American components). Outside the cities, the region is a land of open spaces, much of which is desert.
Parasympathetic vs. Sympathetic Nervous System. The parasympathetic nervous system (PNS) controls homeostasis and the body at rest and is responsible for the body's rest and digest function. The sympathetic nervous system (SNS) controls the body's responses to a perceived threat and is responsible for the fight or flight response.
The nervous system involves the Central Nervous System (CNS) and the Peripheral Nervous System (PNS). CNS involves Brain and Spinal Cord, while the PNS involves the peripheral Sensory and Motor Nerves.All parts are important in their own functions but the brain and spinal cord are more important on a survival and continuity of life basis.