Which hormone, predominantly produced by the thyroid gland, is crucial for regulating the body's metabolic rate?
Triiodothyronine (T3)
Parathyroid hormone (PTH)
Thyroxine (T4)
Calcitonin
Thyroxine (T4) is the primary hormone produced by the thyroid gland that regulates the body's metabolic rate. T4 influences the metabolic rate, heart and digestive function, muscle control, brain development, and maintenance of bones. Triiodothyronine (T3) is also critical in metabolism but is mostly converted from T4 in the body. Calcitonin is a hormone produced by the thyroid gland that helps regulate calcium levels, while parathyroid hormone (PTH) is produced by the parathyroid glands and mainly regulates calcium and phosphate metabolism.
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