Which of the following statements is correct with respect to T₃ and T₄?
A)T₄ has a higher free concentration in the plasma.
B)T₄ is more important physiologically.
C)About one-third of T₄ is converted to T₃ in peripheral tissues.
D)T₄ is more potent.

Question

Which of the following statements is correct with respect to T₃ and T₄?
A)T₄ has a higher free concentration in the plasma.
B)T₄ is more important physiologically.
C)About one-third of T₄ is converted to T₃ in peripheral tissues.
D)T₄ is more potent.

Quizplus · Accepted Answer

About one-third of T₄ is converted to T₃ in peripheral tissues. Both T₃ and T₄ are important hormones produced by the thyroid gland, but T₄ is considered a prohormone because it is converted to the more biologically active T₃ in peripheral tissues. T₄ has a longer half-life than T₃ and a higher total concentration in the plasma, but T₃ has a higher free concentration and is more potent physiologically.

Which of the Following Statements Is Correct with Respect to T₃