The opposite can be true; i.e., people with large muscle mass sometimes have elevated CK levels in the absence of any pathology. This particular enzyme falls into a category where an individual's own normal is more relevant than the normal range given for a population.
1 If the demand increases, and the supply remains the same, there will be a shortage. 2  This will mean the price will increase. 3  If the demand decreases, and the supply remains the same, there will be a surplus. 4  This will mean the price will go down.
If the purchase can be delayed, the demand for the product tends to be elastic. If it cannot be delayed it tends to be inelastic. For example, since I can wait to buy a new stereo until the price drops demand will vary greatly in accordance with price. This product thus would tend to be elastic. Gasoline, on the other hand, I cannot wait for. Thus demand does not vary greatly with price and the product tends to be inelastic.