The Human Nervous System (OCR GCSE Biology A (Gateway Science Suite)): Quizzes
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12 questions from this quiz
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Practise the questions
12 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 impulses to the CNS?
Which type of neuron carries impulses to the CNS?
Sensory neurons
Which type of neuron carries impulses from the CNS to effectors?
Which type of neuron carries impulses from the CNS to effectors?
Motor neurones
What do effectors do in a response?
What do effectors do in a response?
Muscles contract or glands secrete hormones
What are reflexes?
What are reflexes?
Automatic responses before you can think
What is the name of the pathway used in reflex responses?
What is the name of the pathway used in reflex responses?
Reflex arc
Why are reflexes fast?
Why are reflexes fast?
Impulse bypasses conscious brain areas
In a reflex arc, what happens to the impulse in the CNS?
In a reflex arc, what happens to the impulse in the CNS?
It passes to 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
What is reaction time?
What is reaction time?
How long it takes to respond to a stimulus