Endocrine System

• Contrast the PNS and the CNS

  Define the term effector
• Hormones


  Chemical messengers used by the endocrine system
• Endocrine glands


  Produce and release hormones directly into the bloodstream
• Target cells


  Cells that have receptors for particular hormones and respond in a particular way
• Pituitary gland


  • Often referred to as the 'master gland' as it controls many other endocrine glands
• Hypothalamus


  • Sends hormones to the pituitary gland to control its release of hormones to other endocrine glands
  • Releases hormones that control body temperature, growth, thirst, hunger and sensations of pleasure and pain
  • Links the nervous system to the endocrine system and is involved in reflex actions
• Pineal gland


  • Produces the hormone melatonin which controls body rhythms such as waking and sleeping