The Human Nervous System (OCR GCSE Biology A, Combined (Gateway Science Suite)): Flashcards
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Practise the cards
12 cards from this deck
Role of nervous system
Role of nervous system
Allows us to react to surroundings & coordinate actions in response to stimuli
What receptor cells do
What receptor cells do
Convert stimulus into electrical impulse
Where sensory neurons carry impulses
Where sensory neurons carry impulses
From receptors to CNS
Role of CNS
Role of CNS
Process info & coordinate response
Where motor neurones carry impulses
Where motor neurones carry impulses
From CNS to effectors
What effectors do
What effectors do
Carry out response (muscles contract or glands secrete hormones)
What are reflexes
What are reflexes
Automatic responses before you have time to think
What is a reflex arc
What is a reflex arc
Pathway for reflexes allowing quick vital responses
Type of neuron in CNS during reflex arc
Type of neuron in CNS during reflex arc
Relay neuron
What are synapses
What are synapses
Gaps between two neurons
How impulse crosses synapse
How impulse crosses synapse
Chemical released, diffuses across, triggers impulse in next neuron
What is reaction time
What is reaction time
How long it takes to respond to a stimulus