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 ceiling is the legal maximum price at which a good can be sold, while a price floor is the legal minimum price at which a good can be sold. A price ceiling is only binding when the equilibrium price is above the price ceiling. The market price then equals the price ceiling and the quantity demanded exceeds the quantity supplied, creating a shortage of goods. A price floor is only binding when the equilibrium price is below the price floor. The market price then equals the price floor and the quantity supplied exceeds the quantity demanded, creating a surplus of goods.