paper 2

• ENDOCRINE GLANDS-

  • ovaries
  • thyroid
  • pancreas
  • adrenal
  • testes
  • pituitary
• How is the endocrine system different from the central nervous system?

  • The endocrine system coordinates the body’s response to environmental changes using chemical messengers (hormones). 
  • The central nervous system uses electrical impulses.
• the central nervous systems trigger rapid responses that targets a small area using electrical messengers.
• the endocrine (hormonal) system triggers slower responses which uses hormones to send messages to large areas of the body.
• target cells have receptors on them that recognise specific hormones. When these hormones bind with the receptor, it causes a change inside the cell.
• HORMONES are secreted by glands into the bloodstream, where they travel around the body until they reach their target cells or organs.
• thyroxine increases the basal metabolic rate and is regulated by a negative feedback loop