Which acts on intracellular receptor:

Ans. A TSHReceptors for Hormones* Membrane receptor: They mainly bind peptide hormones and catecholamines* Nuclear receptor: Bind small molecules that can diffuse across the cell membrane, such as steroids and vitamin D.Note:* Guyton states: "Amino acid derivatives and peptide hormones interact with cell surface membrane receptors."* Steroids, thyroid hormones, vitamin D and retinoids are lipid soluble and interact with intracellular nuclear receptors.Receptors and their respective hormonesNuclear receptorsThyroxine(Mn: TOAD)EstrogenVitamin AVitamin DCytoplasmic receptorsAll steroids except EstrogenCell membrane via G protein stimulationAll others like ACTH, LH, FSH, GH