Which of the following statements is correct?

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(B) The thyroid gland produces two main hormones: Thyroxine $(T_4)$ and Triiodothyronine $(T_3)$.$T_4$ (Tetraiodothyronine) contains four iodine atoms

Vedclass · Accepted Answer

$T_3$ is more active than $T_4$.

Vedclass · Answer

(B) The thyroid gland produces two main hormones: Thyroxine $(T_4)$ and Triiodothyronine $(T_3)$.$T_4$ (Tetraiodothyronine) contains four iodine atoms,while $T_3$ contains three iodine atoms.Although $T_4$ is produced in larger quantities by the thyroid gland,$T_3$ is the biologically more active form.Most of the $T_4$ is converted into $T_3$ in the peripheral tissues to exert its physiological effects.Therefore,$T_3$ is significantly more potent and active than $T_4$.

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