Nervous System. All mental and physical activities are controlled or mediated by the brain and the nervous system. Voluntary actions originate in the brain and the nerves carry the information to other parts of our body.The nervous system relies upon a correct chemical balance in the body.ervous System. All mental and physical activities are controlled or mediated by the brain and the nervous system. Voluntary actions originate in the brain and the nerves carry the information to other parts of our body.
From Wikipedia, the free encyclopedia. Letts is a city in Louisa County, Iowa, United States established in 1855. The population was 384 at the 2010 census. It is part of the Muscatine Micropolitan Statistical Area. The name is from local benefactor, Maddison Letts.
Story County is a county in the U.S. state of Iowa. As of the 2010 census, the population was 89,542. The county seat is Nevada. Story county comprises the Ames, IA Metropolitan Statistical Area, which is included in the Des Moines-Ames-West Des Moines, IA Combined Statistical Area. The county is home to Iowa State University in Ames.