Question

to produce triiodothyronine and thyroxine, the thyroid gland actively acquires ____. fill in the blank

Explanation:

Triiodothyronine (\(T_3\)) and thyroxine (\(T_4\)) are thyroid hormones. These hormones contain iodine atoms. The thyroid gland has an active transport mechanism (sodium - iodide symporter) to take up iodide (\(I^-\)) from the bloodstream. Iodide is then used in the synthesis of \(T_3\) and \(T_4\).

Answer:

iodide (or \(I^-\))