Hormones and nerves

• Hormone


  A chemical substance, produced by a gland and carried in the bloodstream, which alters the activity of specific target organs
• Adrenaline


  • One of its target organs is the heart, where it increases the heart rate
• Once a hormone has been used, it is destroyed by the liver
• Hormones


  Can control the body, and the effects are much slower than the nervous system, but they last for longer
• Hormones are produced by a..

  Gland
• Hormones released into the bloodstream:

  AHD causes: reabsorption of water