Here are some quick tips on how to distinguish classic crystal from plain glass. 1  Hold up a glass to the light. 2  If the glass acts as a prism and you see a rainbow you are holding crystal.
Growth is a very complex process, and requires the coordinated action of several hormones. The major role of growth hormone in stimulating body growth is to stimulate the liver and other tissues to secrete IGF-I. IGF-I stimulates proliferation of chondrocytes (cartilage cells), resulting in bone growth.
Our genes regulate the growth of normal cells in the body. In every cell there are genes that stimulate growth of the cell and genes that stop the growth of the cells. In normal cells there is a balance in the growth genes and genes that stop growth and therefore uncontrolled growth of the cells is prevented.