The Nervous System

• What is an effector?


  Organ that brings about response (has an effect)
• Neurones have special feautres

  • Myelin sheath - prevents cross talk which could result in incorrect impulses being generated.
  • Insulation helps electrical impulses to pass along in hops so signals travel along the neurone faster
• CNS - brain and spinal cord coordinates responses
• Peripheral N.S - nerves- connecting the brain to different parts of the body + sense organs changes in environment - detected by sense organs which have specialised cells that detect environmental changes/ stimulus - called receptors. Receptors- pass on signals
• Brain- all signals around body are coordinated
• Effectors

  carry out response