Which of the following is not true of the hormone TSH?
A)It is synthesized by the anterior pituitary gland.
B)Its target is the thyroid gland.
C)It stimulates the release of thyroid hormones.
D)Due to negative feedback, a low level of thyroid hormones will inhibit the release of TSH.
E)All of these are true of the hormone TSH.

Question

Quizplus · Accepted Answer

TSH (Thyroid Stimulating Hormone) is actually stimulated, not inhibited, by low levels of thyroid hormones due to negative feedback. When thyroid hormone levels are low, the hypothalamus releases TRH (Thyrotropin-Releasing Hormone), which then stimulates the anterior pituitary gland to release TSH. TSH then stimulates the thyroid gland to produce more thyroid hormones, thereby increasing their levels in the blood.

Which of the Following Is Not True of the Hormone