Reflex arc

• Loud bang
• Cells in ear


  • Detect loud bang
• Sensory neurone


  Transmits signal from receptor to relay neurone
• Relay neurone


  Transmits signal from sensory to motor neurone
• Motor neurone


  Transmits signal from relay neurone to effector
• Effector muscles in army

  Muscles that carry out the response
• Pathway


  1. Receptor

  2. Sensory neurone

  3. Relay neurone

  4. Motor neurone

  5. Effector
• Cover ears


  Response to loud bang
• Effectors produce response to a detected stimulus and are muscles or glands
• Receptors are specialised cells that detect stimuli ( change in environment )
• Synapse is the space between two neurones where the nerve impulse is transmitted