Adrenaline & thyroxine

• What is adrenaline?

  • hormone released by the adrenal glands
  • detects fear or stress
  • sends nervous impulses to adrenal glands
• How can hormone release be affected?

  • negative feedback
  • controls level of hormones
• What does adrenaline prepare you for?

  • fight or flight
• What is thyroxine?

  • hormone released by thyroid gland in neck
• What does thyroxine regulate?

  • Metabolism
• Why is thyroxine improtant?

  • stimulates protein synthesis
  • growth & development
• What does a negative feedback system do?

  • keeps amount of thyroxine in blood at the right level