Question 6 (1 point) Complete this series - TRH - TSH - __ a) ADH b) cortisol c) insulin d) T_(3)-T_(4)

The correct answer is **d) $T_{3}-T_{4}$**.<br /><br />TRH stands for Thyrotropin-Releasing Hormone. TSH stands for Thyroid-Stimulating Hormone. TRH stimulates the release of TSH, which in turn stimulates the thyroid gland to produce and release thyroid hormones, $T_{3}$ (triiodothyronine) and $T_{4}$ (thyroxine). Therefore, the series represents the cascade of hormone release in the thyroid pathway.<br />