Which condition features decreased production of thyroid hormones T3 and T4?

Which condition features decreased production of thyroid hormones T3 and T4?

• A. Hypothyroidism
• B. Hyperthyroidism
• C. Goiter
• D. Thyroiditis

Answer: (A)

Decreased production of thyroid hormones T3 and T4 occurs with hypothyroidism, an underactive thyroid. When the gland can’t make enough hormone, levels of T3 and T4 fall, and the pituitary responds by raising TSH to stimulate the thyroid. This pattern—low T3/T4 with high TSH in many cases—defines primary hypothyroidism and aligns with symptoms like fatigue, cold intolerance, and weight gain. Hyperthyroidism would show the opposite: increased T3 and T4 with suppressed TSH. A goiter is just thyroid enlargement and can occur with normal, high, or low hormone output. Thyroiditis is inflammation that can lead to temporary or permanent changes in hormone production depending on the stage, but it is not defined by decreased production itself.

Decreased production of thyroid hormones T3 and T4 occurs with hypothyroidism, an underactive thyroid. When the gland can’t make enough hormone, levels of T3 and T4 fall, and the pituitary responds by raising TSH to stimulate the thyroid. This pattern—low T3/T4 with high TSH in many cases—defines primary hypothyroidism and aligns with symptoms like fatigue, cold intolerance, and weight gain. Hyperthyroidism would show the opposite: increased T3 and T4 with suppressed TSH. A goiter is just thyroid enlargement and can occur with normal, high, or low hormone output. Thyroiditis is inflammation that can lead to temporary or permanent changes in hormone production depending on the stage, but it is not defined by decreased production itself.