A magnesium test checks the level of magnesium in the blood. Magnesium is an important electrolyte needed for proper muscle, nerve, and enzyme function. It also helps the body use energy and is needed to move other electrolytes (potassium and sodium) into and out of cells.
Floors in Pricing. A price floor is the lowest amount at which a good or service may be sold and still function within the traditional supply and demand model. Prices below the price floor do not result in an appropriate increase in demand.
A price floor is the lowest legal price a commodity can be sold at. Price floors are used by the government to prevent prices from being too low. The most common price floor is the minimum wage--the minimum price that can be payed for labor. Price floors are also used often in agriculture to try to protect farmers.