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.
Blood tests can determine whether a person is lacking hormones (such as thyroid or growth hormone) that are needed for growth or has a genetic problem that affects height. An X-ray of the hand and wrist can show how mature a person's bones are and help predict how much longer he or she will continue to grow. If a lack of growth hormone or very short stature is recognized before the bones stop growing, regular hormone injections may help a child reach a greater height by adulthood.