Question

which of the following elements does the thyroid gland use to make its hormones? a calcium b potassium c iodine d sodium

Explanation:

The thyroid gland uses iodine to produce its hormones. Iodine is essential for the synthesis of thyroid hormones like thyroxine (T4) and triiodothyronine (T3). Calcium is related to bone health and muscle function (e.g., calcium - sensing receptors in the parathyroid, but not thyroid hormone production). Potassium is involved in nerve impulse transmission and muscle contraction. Sodium is important for maintaining osmotic balance and nerve function.

Answer:

C. iodine