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What is the thing called that triggers a response in a reflex arc?
Stimulus
What are receptors?
Organs that receive the stimulus
What are the five receptors called?
Eyes (see the stimulus)
Ears (hear the stimulus)
Skin (feel the stimulus)
Nose (smell the stimulus)
Tongue/mouth (taste the stimulus)
When the receptor has received the stimulus, what is the neurone called that carries the nerve impulse to the central nervous system?
Sensory neurone
What is at the end of the sensory neurone?
Synapse
What does the synapse do?
Holds chemicals that diffuse across the gap between the synapse and next neurone
Which neurone is one the other side of the first synapse?
Relay neuron
What happens when the impulse reaches the end of the relay neurone?
The impulse reaches the synapse and is diffused across the gap by the chemicals there
Which neurone is on the other end of the second synapse?
Motor neurone
What happens when the impulse reaches the motor neurone?
It travels along it until it reaches the next stage
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