Structure & Function (AQA GCSE Biology Combined Science): Flashcards
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Practise the cards
10 cards from this deck
What does the nervous system do?
What does the nervous system do?
React to surroundings & coordinate actions to stimuli
Where do sensory neurons carry impulses to?
Where do sensory neurons carry impulses to?
Central nervous system (CNS)
What do receptor cells convert stimuli into?
What do receptor cells convert stimuli into?
Electrical impulses
Where do motor neurons carry impulses to?
Where do motor neurons carry impulses to?
Effectors
Definition of reflexes
Definition of reflexes
Automatic responses before you have time to think
Why are reflexes important?
Why are reflexes important?
Prevent individual from getting hurt
Middle neuron in reflex arc
Middle neuron in reflex arc
Relay neuron
Definition of synapses
Definition of synapses
Gaps between two neurons
How impulse crosses synapse
How impulse crosses synapse
Chemical released, diffuses across, triggers next impulse
Definition of reaction time
Definition of reaction time
How long it takes to respond to a stimulus