Synapses and reflexes

• What are synapses

  The connection between two neurones
• how are nerve signals transferred

  chemicals diffuse across the gap then set off a new electrical signal in the next neurone
• what are reflexes

  rapid automatic responses to certain stimuli that don’t involve the conscious part of the brain
• describe a reflex arc

  stimulus is detected by receptors

  impulses are sent along a sensory neurone to a relay neurone in the CNS

  impulses are sent along a motor neurone

  they travel along the motor neurone to the effector
• why are reflex arcs quicker

  you don’t have to think about the response