The sodium-iodide symporter plays a role in the accumulation of iodide in the thyroid gland. Here, one iodide gets converted to one iodine, which is utilized for the formation of either of the two types of thyroid hormones, T3 and T4. T3 and T4 are named after the number of iodines found in each of these hormones. To produce a single molecule of T3, a total of sodium ions must move down their concentration gradients by secondary active transport. The movement of iodide ions occurs in the direction as sodium ions.

Six, same.

Explanation:

Thyroid hormone includes the triiodothyronine and thyroxine. These hormones regulate the metabolism and temperature of the body. The irregular secretion of these hormones causes weakness, fatigue and hair loss.

The iodine molecule is important for the necessary of thyroid hormone. The six molecules of sodium moves via the secondary transport for the production of triidothyronine. The iodine and sodium ions move in the same direction in the cell.

Thus, the answer is six and same.

c) it can produce three-dimensional images.