Main (predominant) hormone produced by the thyroid according to the source material?

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Multiple Choice

Main (predominant) hormone produced by the thyroid according to the source material?

The main hormone secreted by the thyroid is thyroxine, T4. Follicular cells release T4 in larger amounts, and it acts as a circulating reservoir. Peripheral tissues convert most of this T4 into the more active form, T3, by deiodination, which explains why T3 is the biologically potent hormone even though it is produced in smaller amounts by the thyroid itself. Calcitonin, produced by C cells, plays a smaller, more specific role in calcium regulation and is not the predominant thyroid hormone. So, the predominant thyroid hormone is T4.

The main hormone secreted by the thyroid is thyroxine, T4. Follicular cells release T4 in larger amounts, and it acts as a circulating reservoir. Peripheral tissues convert most of this T4 into the more active form, T3, by deiodination, which explains why T3 is the biologically potent hormone even though it is produced in smaller amounts by the thyroid itself. Calcitonin, produced by C cells, plays a smaller, more specific role in calcium regulation and is not the predominant thyroid hormone. So, the predominant thyroid hormone is T4.

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