Part 2 Thyroid hormones and antithyroid drugs
larynx Colloid right Principal cells left thyroid -thyroid gland gland Parafollicular cells trachea Carlyn Iverson
hypothalami high low blood calcium blood calcium level thyroid a calcitonin thyroid hormone TSH bone of bone by osteoblasts contains osteoclasts b blood blood Ca2+ blood calcium level level thyroxine decreases Increases
A. Thyroid hormones
Metabolism ofthyroid hormones 1. Uptake of iodide 2. Activation of iodide(peroxidase), and iodination and coupling of tyrosine 3. Formation of thyroxine(T4) and triiodothyronine (T3)from iodotyrosine Secretion of thyroid hormones(proteolytic enzymes 5. Regulation by thyroid stimulating hormone (TSH), T4, T3