adrenaline

• adrenaline is released from the adrenal glands , which are above the kidneys
• released when you are scared, excited or angry
• prepares body for intense action - "fight or flight"
• increases blood glucose levels

  • more energy
  • in liver = more respiration
• pupils dilate to allow more light
• heart rate increases so more oxygen can be delivered to muscles
• hair stands on end

  • to make your look bigger, and more fierce
• blood diverted from gut to muscles

  • moves energy to muscles to "fight or flight" instead of digestion.