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.
Endocrine: Each hormone is a chemical that control function of many different organs. Brain hormones send orders to organs to work. Brain secretes TSH to order thyroid to work to control whole body. Sexual hormones control brain and whole body, as does Insulin controls use of sugar in whole body (brain included).