Neurones and the brain (AQA GCSE Biology): Flashcards
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Definition of neurones
Definition of neurones
Special cells/nerve cells
Components of CNS
Components of CNS
Brain and spinal cord
Sensory neurone function
Sensory neurone function
Carry signals from receptors to CNS
Relay neurone function
Relay neurone function
Pass signals from sensory to motor neurones
Motor neurone function
Motor neurone function
Carry signals from CNS to effectors
Examples of effectors
Examples of effectors
Muscles and glands
Function of dendrites
Function of dendrites
Collect electrical impulses from receptors
Function of cell body in neurone
Function of cell body in neurone
Contains nucleus & controls the neurone
Function of axon
Function of axon
Carries impulses over long distances
Function of myelin sheath
Function of myelin sheath
Insulates axon, stops leaking, speeds up impulses
Cerebral cortex responsibilities
Cerebral cortex responsibilities
Voluntary movement, interpreting sensory info, learning & memory
Medulla function
Medulla function
Controls unconscious processes like heartbeat & breathing
Cerebellum function
Cerebellum function
Coordinates smooth movement, balance & posture
Location of relay neurones
Location of relay neurones
Inside the CNS
Effect of myelin sheath on signal speed
Effect of myelin sheath on signal speed
Makes impulses travel much faster