homeostasis paper2🩷

• Receptor cells


  • Cells that detect a stimulus (changes in the environment)
  • Receptor cells in the skin detect changes in touch, pressure, pain and temperature
  • Light sensitive cells in the retina of the eye detect changes in light and colour
  • Receptor cells in the nose detect chemicals in the air
  • Receptor cells in the tongue detect chemicals in food
  • Receptor cells in the inner ear detect changes in sound
• Receptor cells are in the skin, nose, tongue, inner ear, and retina
• Coordination centres


  • Brain
  • Spinal cord
  • Pancreas
• Brain


  • Coordinates information from the receptor cells and sends signals to the muscles and glands
• Spinal cord


  • Coordinates messages from the brain and receptor cells and coordinates reflexes
• Pancreas


  • Coordinates the glucose levels in the blood
• Effectors


  Muscles or glands in the body that produce a response to restore optimum levels in the body
• Effectors


  • A muscle contracting to lift a leg
  • A gland releasing a hormone into the blood