An individual nerve cell is a neurone. Bundles of these form nerves that run around your body transmitting information. Bundles of these are called possible a nerve trunk or nerve ganglion.
The five goals are typically divided into the three that are most important for macroeconomics (the macroeconomic goals of full employment, stability and economic growth) and the two that are most important for microeconomics (the microeconomic goals of efficiency and equity).
A mixed economy is an economic system that has some combination of traditional, command, and market economies; or is a modified free enterprise economy. Mixed economies exist because the world is NOT neat and orderly. Often mixed economies form when one type of economy comes into contact with other cultures and they borrow ideas. Major events such as revolutions and economic depressions may cause economic systems to change, and sometimes a mixed economy is the result of an economy simply changing over time.