which is secreted by the thyroid influences the rate of metabolism
thyroxine Thyroxine     thyroxine (T4) and triiodothyronine (T3), are tyrosine-based hormones produced by the thyroid gland the thyroid and parathyroid glands are in the neck. the thyroid harmones accelerate the metabolic rate and oxygen consumption in all body tissues.n the other hand, the insufficient of the secretion of thyroid hormone or thyroxine will cause the hypothyroidism. Hypothyroidism's symptoms include the basal metabolic rate that below the normal level.