Since thyroid hormones thyroxine and T3 regulate the metabolic rate of cells they play a role in the cell’s ability to perform normal functions in growth and maintenance.
	Androgens such as testosterone build bone and muscle, hence their abuse (anabolic steroids) by some athletes.
	Estrogens are important for normal maintenance and remodeling throughout life. Normally the adrenal cortex secretes sufficient estrogen to supplement the gonadal supply. The decline of estrogen levels in post-menopausal women plays an important role in osteoporosis.