Intracellular hormone receptors: - - Several hormones, including adrenal & gonadal steroid hormones, thyroid hormones, retinoid hormones and vitamin D, bind with protein receptors inside the cell. - Because these hormones are lipid soluble. Cell surface receptors: - - All the peptide hormones uses it - They are water soluble. - They act secondary messengers (CGMP, CAMP etc.) Examples: Catecholamines (epinephrine, dopamine) Insulin Glucagon Prolactin Growth hormone etc.
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