TSH is a pituitary hormone that controls thyroid gland activity. It stimulates production of T3 and T4 hormones in the thyroid gland. TSH levels are influenced by TRH and blood thyroid hormone levels
Thyroglobulin is a protein used by thyroid gland to produce hormones. Most thyroglobulin stays in thyroid, small amount leaks into bloodstream. Levels directly proportional to thyroid gland size
Elevated anti-TPO antibodies indicate autoimmune thyroiditis. These antibodies signal immune system attacking thyroid gland. Thyroid controls metabolism and influences other hormones. Untreated condition can cause permanent thyroid damage
TSH test measures thyroid gland activity and hormone levels. TSH is produced by pituitary gland to control thyroid hormone production. Thyroid gland manages metabolism and controls body functions. TSH triggers production of T4, which is converted to T3
T3 test measures active thyroid hormone levels in blood. Test helps diagnose thyroid disorders, especially hyperthyroidism. Thyroid gland regulates energy use, body temperature, and mood
T3 and T4 are thyroid hormones that control body's energy use. Hormones exist in bound and free forms. Free T3 and T4 flow independently through bloodstream