Which nutrient is required for the thyroid gland to produce thyroxine?
Correct answer: A. Iodine
- A. Iodine
- B. Calcium
- C. Iron
- D. Potassium
Explanation
Iodine is a structural component needed to form thyroid hormones T3 and T4. Calcium supports bones and muscle function, but it is not used to synthesise thyroxine.
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About Endocrine System
The endocrine system covers hormone-producing glands including the pituitary, thyroid, parathyroids, adrenals, pancreas, pineal gland, ovaries and testes. It explains hormone classes, target-cell responses, feedback control, and the functions of hormones such as insulin, thyroxine, cortisol, growth hormone and ADH, which is often confused with a kidney-produced substance.
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