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.
IGF is a hormone that your body makes naturally. It used to be known as somatomedin. IGF, which comes mainly from the liver, acts a lot like insulin. IGF helps to control growth hormone secretion in the pituitary gland. IGF works with growth hormones to promote growth and development of bone and tissue. These hormones also affect how your body metabolizes sugar, or glucose.