( A ) Thyroid hormones play an important role in the regulation of the basal metabolic rate.
( B ) Follicular cells of thyroid gland also secretes a protein hormone called thyrocalcitonin which regulates the blood calcium levels.
( C ) Thyroid hormones support the process of red blood cell formation.
( D ) Thyroid hormones control the metabolism of carbohydrates, proteins and fats.
