<prompt> Which acts on nuclear receptorsGlucocorticoidsThyroxineProgesteroneInsulin  <response>: Ans. is b i.e., Thyroxine Hormones with intracellular receptors Group I hormones Cytoplasmic :- Glucocorticoids cortisolcortisone, mineralocorticoids, androgens, progestins. Nucleus :- Estrogen, Thyroid hormones T3, T4, retinoic acid, Vitamin D Calcitriol or 1,25 OH2 D3. 