The Thyroid Produces and Secretes 2 Metabolic Hormones o Two principal hormones Thyroxine (4)and triiodothyronine(t Required for homeostasis of all cells Influence cell differentiation, growth, and metabolism Considered the major metabolic hormones because they target virtually every tissueThe Thyroid Produces and Secretes 2 Metabolic Hormones  Two principal hormones  Thyroxine (T4 ) and triiodothyronine (T3)  Required for homeostasis of all cells  Influence cell differentiation, growth, and metabolism  Considered the major metabolic hormones because they target virtually every tissue