How is most thyroid hormone transported in the plasma? A)as T₄ bonded to globulin B)as T₃ bonded to globulin C)as free T₄ D)as free T₃

Question

Quizplus · Accepted Answer

Most thyroid hormone is transported in the plasma as T4 (thyroxine) bonded to globulin, specifically thyroxine-binding globulin (TBG). This is known as T₄ or T4-binding globulin. Only a small fraction of thyroid hormone is transported as free hormone (T₄ or T₃). Therefore, choice A is the correct answer.

How Is Most Thyroid Hormone Transported in the Plasma