Alcon Laboratories Pvt. Ltd. (Novartis India)
Hormones are your body's chemical messengers. They travel in your bloodstream to tissues or organs. They work slowly, over time, and affect many different processes, including:-Growth and development,Metabolism - how your body gets energy from the foods you eat,Sexual function,Reproduction,Mood. A chemical substance secreted by an endocrine gland or group of endocrine cells that acts to control or regulate specific physiological processes, including growth, metabolism, and reproduction. Most hormones are secreted by endocrine cells in one part of the body and then transported by the blood to their target site of action in another part, though some hormones act only in the region in which they are secreted. Many of the principal hormones of vertebrates, such as growth hormone and thyrotropin, are secreted by the pituitary gland, which is in turn regulated by neurohormone secretions of the hypothalamus. Hormones also include the endorphins, androgens, and estrogens.
"The thyroid gland sits in the front of the neck, at the level of your voice box, and controls the rate of at which the body's cells work (the metabolic rate) by the production of thyroxine.
If the gland is overactive the rate of metabolism is increased, and this results in some or all of these symptoms:
1. weight loss in spite of increased appetite
2. rapid heart rate
3. a fine tremor If the gland is underactive you might notice some or all of the following:
1. weight gain
2. feeling cold
3. a change in your voice
4. dry skin Treatment of an overactive gland is by medication to inhibit the excess production of thyroid hormone. Surgery or radioactive iodine may be necessary alternatives. Treatment of an underactive gland is by the taking of thyroxine."
Glaxo Smithkline Pharmaceuticals Ltd.