Stress

  • Eyes – pupils dilate for better tunnel vision, but there is a loss of peripheral vision
  • Ears – hearing becomes less acute
  • Tears and saliva – lower production of both (dry eyes and mouth)
  • Skin – veins in skin constrict (colder hands and feet) to send more blood to major muscle groups (to fight or flee), causing the “chill” sometimes associated with fear
  • Lungs – air passages open; breathing becomes rapid and shallow
  • Blood sugar level – increases for energy
  • Heart – beats faster and harder
  • Blood pressure – increases
  • Blood vessels – shunt blood to upper arms and upper legs (fight or flee); away from hands and feet, causing vasoconstriction (they get colder)
  • Muscles – become tense; trembling may occur; muscles around hair follicles constrict, causing goose bumps
  • Digestion – slows
  • Immune system – shuts down
  • Bladder – relaxes
  • Genitals – erections inhibited (other things to think about)
  • Mental focus – trouble focusing on small tasks, thinking only of dealing with the threat