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.
The hypothalamus and hormone control. The hypothalamus is part of the brain and not actually part of the endocrine system. The hypothalamus works with the pituitary gland to control the activity of most of the other glands of the endocrine system. It reacts to changes in the amount of hormones in the body.