Final answer:
The combining form for the element deposited into bone and controlled by the thyroid gland is 'calc/o'. The thyroid produces thyroxin, which regulates metabolism and contains iodine used in medical imaging.
Step-by-step explanation:
The element that is deposited into bone and controlled by the thyroid gland is calcium. The combining form for calcium is calc/o. The thyroid gland, located in the neck, produces the hormone thyroxin, which is crucial for regulating the body's metabolism.
Thyroxin molecules contain iodine, an element also associated with thyroid function. In medical imaging, radioactive iodine in the form of Na¹³¹I or Na¹²³I accumulates in the thyroid gland, allowing for diagnostic evaluations through γ-emission during the decay of these isotopes.