Which of the following is true of T₄?
A) It contains three atoms of iodine.
B) It binds more efficiently to target cell receptors than does T₃.
C) It is a prohormone for T₃.
D) All of the above are true of T₄.

Question

Quizplus · Accepted Answer

T₄ is a prohormone for T₃, meaning that it is converted into T₃, the active form of thyroid hormone, in target tissue. Option A is incorrect as T₄ actually contains four atoms of iodine. Option B is also incorrect as T₃ is known to bind more efficiently to target cell receptors than T₄.

Which of the Following Is True of T₄