The radioisotope used to study the thyroid gland is__________________?
Correct answer: A. Iodine
- A. Iodine
- B. Cobalt
- C. Iron
- D. Carbon
Explanation
Radioactive iodine is concentrated by the thyroid because the gland uses iodine to synthesize thyroid hormones, allowing iodine isotopes to image or study its function. Cobalt, iron, and carbon do not have this specific thyroid-seeking behaviour.
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