In the hypothalamic-pituitary-thyroid axis, elevated circulating thyroid hormones suppress the release of TRH and TSH. What is the main physiological purpose of this feedback mechanism?

• A. To prevent overstimulation of thyroid hormone secretion
• B. To increase calcium reabsorption by the kidneys
• C. To stimulate parathyroid hormone release during stress
• D. To enhance calcitonin synthesis in bone tissue

Answer: (A)