<prompt> Thyroid hormone acts through receptors present onCell membraneCytoplasmic membraneNuclear membraneDNA  <response>: Thyroid hormoneEither of two hormones, thyroxine T4 or triiodothyronine T3, secreted by the follicles of the thyroid gland. They act on receptors in tissues throughout the body to increase the production of cellular proteins, the metabolic rate, and the activities of the sympathetic nervous system.Ref: Ganong;s review of medical physiology; 24th edition; page no: 341 