Secreting hormones

• The endocrine system secretes hormones through glands. They are transported in the blood stream and effect a target organ.
• Is the endocrine system slower or faster than the nervous system?

  Slower
• Is the endocrine system longer or shorter lasting than the nervous system?

  Longer
• What is a hormone?

  A chemical substance that is carried in the blood stream, produced by a gland and alters the activity of a specific target organ
• Once a hormone has been used, it is destroyed by the liver.
• The endocrine system secretes chemical messages.
• Transmission of signal in the endocrine system is through the blood stream.
• The effectors of the endocrine system are target cells in particular tissues.