When one burns wood or coal to produce heat, toxins are released in the form of smoke. The same happens when your body burns food for energy. This process is called metabolism and the toxic molecules produced as a result are called free radicals.
hormones, thyrotropic (thyroid-stimulating hormone [TSH]), n a pituitary hormone that regulates the growth and activity of the thyroid gland.ormones, thyrotropic (thyroid-stimulating hormone [TSH]), n a pituitary hormone that regulates the growth and activity of the thyroid gland.
Thyroid hormones. The thyroid hormones, triiodothyronine (T3) and its prohormone, thyroxine (T4), are tyrosine-based hormones produced by the thyroid gland that are primarily responsible for regulation of metabolism. T3 and T4 are partially composed of iodine (see molecular model).