The Human Nervous System (OCR GCSE Biology A, Combined (Gateway Science Suite)): Quizzes
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Practise the questions
10 questions from this quiz
What does the nervous system allow us to do?
What does the nervous system allow us to do?
React to surroundings & coordinate actions
What do receptor cells do?
What do receptor cells do?
Convert a stimulus into an electrical impulse
Which type of neuron carries electrical impulses to the CNS?
Which type of neuron carries electrical impulses to the CNS?
Sensory neurons
What do effectors do in the nervous system?
What do effectors do in the nervous system?
Carry out response (muscle/gland action)
What are reflexes?
What are reflexes?
Automatic responses before you think
Why are reflexes important?
Why are reflexes important?
They prevent the individual getting hurt
How does a reflex arc differ from a usual response?
How does a reflex arc differ from a usual response?
Impulse doesn't pass through conscious brain
In a reflex arc, what does the impulse pass to in the CNS?
In a reflex arc, what does the impulse pass to in the CNS?
A relay neuron
What are synapses?
What are synapses?
Gaps between two neurons
What happens when an impulse reaches the end of the first neuron at a synapse?
What happens when an impulse reaches the end of the first neuron at a synapse?
A chemical is released into the synapse