The Human Nervous System (OCR GCSE Biology A (Gateway Science Suite)): Flashcards
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Practise the cards
14 cards from this deck
Function of the nervous system
Function of the nervous system
Allows us to react to surroundings & coordinate actions in response to stimuli
What receptor cells do
What receptor cells do
Convert a stimulus into an electrical impulse
Where sensory neurons carry impulses
Where sensory neurons carry impulses
To the CNS (central nervous system)
What CNS stands for
What CNS stands for
Central nervous system
Where motor neurones carry impulses
Where motor neurones carry impulses
To effectors
What effectors do
What effectors do
Carry out response (muscles contract or glands secrete hormones)
Definition of reflexes
Definition of reflexes
Automatic responses before you have time to think
Why reflexes are important
Why reflexes are important
They prevent the individual from getting hurt
Definition of reflex arc
Definition of reflex arc
Pathway allowing vital responses to take place quickly
Type of neuron in CNS during reflex arc
Type of neuron in CNS during reflex arc
Relay neuron
Definition of synapses
Definition of synapses
Gaps between two neurons
How impulses cross synapses
How impulses cross synapses
Chemical released, diffuses across, triggers impulse in next neuron
Definition of reaction time
Definition of reaction time
How long it takes you to respond to a stimulus
How to measure reaction time
How to measure reaction time
Ruler drop test