Final answer:
The thyroid gland releases two hormones: thyroxine (T4) and triiodothyronine (T3). TSH from the anterior pituitary gland regulates the production of T3 and T4.
Step-by-step explanation:
The thyroid gland releases two hormones: thyroxine (T4) and triiodothyronine (T3).
These hormones are synthesized from tyrosine in the presence of iodine. Iodine is taken up by the thyroid gland through an active transport mechanism and converted into active iodine (I or I+) with the help of an enzyme called thyroperoxidase.
TSH (thyroid-stimulating hormone) from the anterior pituitary gland regulates the production of T3 and T4. TSH is released in response to TRH (thyrotropin-releasing hormone) from the hypothalamus, and it stimulates the thyroid gland to release T3 and T4 into the bloodstream.