ENDOCRINE SYSTEM

• WHAT ARE THE FUNCTIONS OF THE ENDOCRINE SYSTEM?

  1. To secrete hormones that are required to regulate many bodily functions
  2. To provide a chemical system of communication via bloodstream
• EFFECT OF ENDOCRINE SYSTEM SECRETING SPECIFIC HORMONE?

  releases required amount of a specific hormone to promote appropriate growth/ metabolism/ reproduction
• EFFECT OF ENDOCRINE SYSTEM PROVIDING A CHEMICAL SYSTEM?

  hormones diffuse into bloodstream and may travel to distant body regions, where they elicit a response in target cells
• EXAMPLES OF GLANDS AND THE HORMONES THEY SECRETE?

  THYROID

  • in neck
  • thyroxine

  PANCREAS

  • near stomach
  • insulin

  ADRENAL GLAND

  • above pancreas
  • adrenaline

  PINEAL GLAND

  • middle of brain
  • melatonin

  TESTES AND OVARIES

  • testosterone, oestrogen, progesterone

  PITUITARY GLAND

  • outside of brain
  • ACTH
• WHAT DOES THYROXINE DO?

  REGULATES

  • metabolic rate
  • heart and digestive functions
  • muscle control
  • brain development
  • bone maintenance
• WHAT DOES INSULIN DO?

  controls blood glucose levels
• WHAT DOES ADRENALINE DO?

  vital for body's flight or fight response
• WHAT DOES MELATONIN DO?

  maintains body's main circadian rhythm by inducing sleep
• WHAT DO TESTOSTERONE, OESTROGEN AND PROGESTERONE DO?

  control development of reproductive organs
• ENDOCRINE SYSTEM APPLICATION?

  • endocrine system works alongside nervous system
  • but uses neurotransmitters to transmit information between neurons across synapses
  • instead of hormones to transmit information between glands via bloodstream
  • slower than nervous system
  • but has more widespread, long-lasting effects
• WHAT DOES ACTH DO?

  control release of hormones from other glands