The thyroid gland in the neck is crucial for the body's metabolic processes. Thyroid hormones, referred to as T3 and T4 are iodine-containing derivatives of an amino acid which serve as the drivers of major metabolic pathways. This video provides the complete information about the synthesis of T3 and T4 hormones along with their detailed mechanism of action. timeline: 0:07 introduction 0:52 TRH release 2:21 TSH release + function 3:51 intracellular pathway activation 8:38 Iodine interaction 20:46 overview of steps