<prompt> Cell surface receptors are used by which hormone-ThyroxineTestosteroneGlucagonCortisol  <response>: Ans. is ci.e., Glucagon Type of receptorso All hormones act through specific receptors present inside the cell intracellular or on the surface of cells membrane receptors.A. Membrane receptorso Present on the cell membrane.o Their drughormone binding domain is extracellular and effector domain is intracellular.These are:1. G protein coupled receptors - It may act through.a Adenylyl cyclase cAMP - TSH, FSH, LH, ACTH, glucagon, PTH, adrenaline, calcitonin, vasopressin V2. cAM P - PRIH Dopamineb IP3-DAG Ca2 and protein kinase c -Vasopressin V1, oxytocin.c Channel regulation Ca2, K Na2. Receptor with Intrinsic ion channels - Na, K, Ca2 or C1-3. Enzyme linked receptorsa Intrinsic enzyme receptors tyrosine kinase receptors - Insulin.b JAK-STAT kinase binding receptors - Growth hormone, Prolactin.B. Intracellular receptors transcription factorso Present inside the cell and induce synthesis of specific protein by increasing the expression of specific gene.1. Cytoplasmic - Glucocorticoids, Mineralocorticoids, Androgens, Progestins.2. Nuclear - Thyroxine, Triiodothyronine, Estrogen, retinoic acid, Vit D. 