Hormone A chemical substance produced in one part of the body that is released into the blood to control functions of another part or parts of the body. Examples include insulin, estrogen, and adrenaline/epinephrine. Related Articles: Episode 10: Staying Active with DiabetesErectile DysfunctionGLP-1 Receptor AgonistsDPP-IV InhibitorsEpisode 11: A Real Diabetes Patient Story with Joe