Find out why you need a registered agent for your LLC or corporation. Learn about the role of registered agents and how to select a registered agent. In addition to certain guarantees provided by law, LegalZoom guarantees your satisfaction with our services and support.
Thyroxine is the main hormone secreted into the bloodstream by the thyroid gland. It plays vital roles in digestion, heart and muscle function, brain development and maintenance of bones. Alternative names for thyroxine T4; tetraiodothyronine; thyroxin.
Thyroid hormone blood tests include: Total thyroxine (T4). Most of the thyroxine (T4) in the blood is attached to a protein called thyroxine-binding globulin. Less than 1% of the T4 is unattached. A total T4 blood test measures both bound and free thyroxine.