Receptors - cells that can detect changes inside or outside the body
The Central Nervous System - CNS - the spinal cord and the brain
Effectors - organs in the body that cause a response - muscles/glands
Sense organs - organs that contain receptor cells
Stimuli - changes that receptor cells detect
Neurones - individual nerve cells specialised to transmit electrical impulses
Nerves - bundles of neurones that connect receptors and effectors to the CNS
Synapse - the gap between the two ends of two neurones
Chemical transmitters - chemicals that pass across a synapse and cause an electrical impulse to be generated in the next neurone
Voluntary/Reflex actions...Sensory/Relay/Motor neurones carry impulses.
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