Thyroid and parathyroid hormones and calcium homeostasis

The thyroid gland is under the control of thyroid-stimulating hormone (TSH) from the pituitary. It secretes thyroxine (T4) and triiodothyronine (T3). Iodine is essential for the synthesis of thyroid hormones. T4 is probably converted to T3 in peripheral tissues. Thyroid hormones have a role in growth and development, but their principal effect is the control of basal metabolic rate. Deficiency or excess affects all the tissues of the body, reducing or increasing the metabolic rate, resulting in hypothermia or hyperthermia, respectively.
Source: Anaesthesia and intensive care medicine - Category: Anesthesiology Authors: Tags: Physiology Source Type: research