Which statement best describes the metabolic state in hyperthyroidism?

Which statement best describes the metabolic state in hyperthyroidism?

• A. Increased metabolism
• B. Decreased metabolism
• C. Metabolism unchanged
• D. Normal metabolism

Answer: (A)

Hyperthyroidism raises the body's metabolic rate because excess thyroid hormones boost nearly all energy-use pathways. T3 and T4 increase mitochondrial activity and the enzymes involved in carbohydrate, fat, and protein metabolism, raise heat production, and amplify sensitivity to catecholamines by upregulating beta-adrenergic receptors. The overall effect is higher resting energy expenditure and faster nutrient turnover, often with weight loss and heat intolerance. So the statement that best fits is increased metabolism. The other possibilities don’t match because decreased, unchanged, or normal metabolism aligns with hypothyroidism or euthyroid states, not with the hormone excess seen in hyperthyroidism.

Hyperthyroidism raises the body's metabolic rate because excess thyroid hormones boost nearly all energy-use pathways. T3 and T4 increase mitochondrial activity and the enzymes involved in carbohydrate, fat, and protein metabolism, raise heat production, and amplify sensitivity to catecholamines by upregulating beta-adrenergic receptors. The overall effect is higher resting energy expenditure and faster nutrient turnover, often with weight loss and heat intolerance. So the statement that best fits is increased metabolism. The other possibilities don’t match because decreased, unchanged, or normal metabolism aligns with hypothyroidism or euthyroid states, not with the hormone excess seen in hyperthyroidism.