Circulating Thyroxine Exerts Negative Feedback on

question 171

Multiple Choice

Circulating thyroxine exerts negative feedback on

• A) cells of the anterior pituitary, making them less responsive to thyrotropin-releasing hormone (TRH).
• B) cells of the hypothalamus, so they produce and release more thyrotropin-releasing hormone (TRH).
• C) cells of the posterior pituitary, so they produce less thyroid-stimulating hormone (TSH).
• D) cells of the thyroid gland, so they produce less calcitonin.
• E) target cells, so they convert less of the inactive to the active form of thyroid hormone.

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