What you'll learn
How the nervous system coordinates the body.
Key ideas
- Neurones, synapses, the CNS (brain and spinal cord).
- The reflex arc: receptor → sensory → relay → motor → effector.
Exam tips
- Learn the reflex arc order.
- Explain signal transfer at a synapse.
Common mistakes
- Confusing sensory and motor neurones.
- Missing a stage of the reflex arc.