ThyroxineA.    Regulates basal metabolic rateB.    Supports erythropoiesisC.    Influences water and electrolyte balanceD.    Regulates blood calcium levelsWhich of the above are correct?

Thyroxine regulates the basal metabolic rate and controls the metabolism of carbohydrates, proteins and fats. It also supports the process of red blood cell formation and influences the water and electrolyte balance. The blood calcium levels are regulated by thyrocalcitonin (not thyroxine).