Synapses and Reflexes

• What is a synapse?


  A connection between two neurones
• How do nerve signals move across synapses?

  They are transferred by chemicals which diffuse across the gap
• What are reflexes for?

  Preventing injuryw
• What are reflexes?


  Rapid and automatic responses which don't involve the conscious part of the brain
• What is an example of a reflex?


  Your pupil shrinking when someone shines bright light in your eye to stop damage
• What is the name for the passage of information in a reflex?

  A reflex arc
• What is the chronology of a reflex arc?

  Stimulus -> Receptor -> Sensory neurone -> Relay neurone -> Motor neurone -> Effector
• Where are relay neurones located?

  Inside the CNS