Home ยป The hormones thyroxine and tri-iodothyronine contain which element? Endocrine System MCQs The hormones thyroxine and tri-iodothyronine contain which element? February 11, 2022 2 Views Q. The hormones thyroxine and tri-iodothyronine contain which element? A. cobalt B. iron C. iodine D. manganese Answer: iodine
The hormones known as “catecholamines” (adrenaline, noradrenaline and dopamine) are not lipid soluble. Therefore their receptor sites are