The normal characteristics of smooth muscle: Smooth muscle is found in many different places in the human body: Unlike skeletal muscle, smooth muscle is generally not identifiable from gross observation of the body.
Demand can be classified as elastic, inelastic or unitary. An elastic demand is one in which the change in quantity demanded due to a change in price is large. An inelastic demand is one in which the change in quantity demanded due to a change in price is small. This is taken from a website at www.agmrc.org.
Elastic is when the % change in demands is greater than the % change in price. Inelastic is the opposite. Textbooks--inelastic because students will always need books, if the price changes the number demand for books would still remain the same; therefore, the % change in price is greater than the % change in demand.