Select the correct sequence of events involved in regulating secretion of thyroid hormones. 1. pituitary releases thyroid-stimulating hormone (TSH)
2) hypothalamus secretes thyroid-releasing hormone (TRH)
3) thyroid hormones inhibit long-term TRH secretion
4) thyroid secretes thyroid hormones
5) thyroid hormones inhibit TSH secretion
A) 1, 2, 4, 5, 3
B) 2, 1, 4, 5, 3
C) 3, 1, 4, 5, 2
D) 3, 4, 1, 2, 5
E) 2, 4, 5, 1, 3

Question

Select the correct sequence of events involved in regulating secretion of thyroid hormones. 1.  pituitary releases thyroid-stimulating hormone (TSH)
2)  hypothalamus secretes thyroid-releasing hormone (TRH)
3)  thyroid hormones inhibit long-term TRH secretion
4)  thyroid secretes thyroid hormones
5)  thyroid hormones inhibit TSH secretion
A) 1, 2, 4, 5, 3
B) 2, 1, 4, 5, 3
C) 3, 1, 4, 5, 2
D) 3, 4, 1, 2, 5
E) 2, 4, 5, 1, 3

Quizplus · Accepted Answer

The correct sequence starts with the hypothalamus secreting TRH, which then stimulates the pituitary to release TSH. TSH prompts the thyroid to secrete thyroid hormones, which then inhibit both TSH and TRH secretion to maintain hormone levels within a healthy range.

Select the Correct Sequence of Events Involved in Regulating Secretion