Hormone produced by the thyroid gland that increases metabolism and regulates growth?

Hormone produced by the thyroid gland that increases metabolism and regulates growth?

• A. Thyroxine (T4)
• B. Thyroid gland
• C. Parathyroid glands
• D. Cortisol

Answer: (A)

Thyroid hormones control how fast cells use energy and how they grow. The thyroid gland makes thyroxine (T4) and triiodothyronine (T3), with T4 produced in larger amounts and often converted to the more active T3 in tissues. These hormones raise the basal metabolic rate by boosting the production of enzymes involved in energy metabolism and increasing activity of the Na+/K+-ATPase, which also generates heat. They are essential for normal growth and development, particularly of the brain and skeleton, by influencing gene expression and growth signals. The hormone described is thyroxine (T4). The other options refer to either non-hormonal structures (the thyroid gland itself) or hormones from other glands (parathyroid hormone from the parathyroids and cortisol from the adrenal cortex).

Thyroid hormones control how fast cells use energy and how they grow. The thyroid gland makes thyroxine (T4) and triiodothyronine (T3), with T4 produced in larger amounts and often converted to the more active T3 in tissues. These hormones raise the basal metabolic rate by boosting the production of enzymes involved in energy metabolism and increasing activity of the Na+/K+-ATPase, which also generates heat. They are essential for normal growth and development, particularly of the brain and skeleton, by influencing gene expression and growth signals. The hormone described is thyroxine (T4). The other options refer to either non-hormonal structures (the thyroid gland itself) or hormones from other glands (parathyroid hormone from the parathyroids and cortisol from the adrenal cortex).