<prompt> All of the following use c-AMP as a second messenger exceptCoicotropinDopamineTestosteroneVasopressin  <response>: Testosterone - the principal male sex hormone androgen is a steroid hormone that is produced by Leydig;s cells of the testes in response to luteinizing hormone secreted by the pituitary gland. It is also produced by the adrenal coex in both males and females.Ref: Ganong;s review of medical physiology; 24th edition: page no: 423 