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15 cards from this deck
Movement of ions across neuron membrane
Inside negative, outside positive
Minimum stimulus required to start a nerve impulse
Impulse size unaffected by stimulus size (if above threshold)
Number of neurons stimulated & frequency of impulses
Inside becomes positive, outside becomes negative
Time for nerve cell to recover before next impulse
Increases speed; impulse jumps between nodes of Ranvier
Greater diameter = faster impulse
Where two neurons come into close contact
Tiny gap between pre-synaptic and post-synaptic neurons
Noradrenaline and dopamine
Broken down by enzymes or reabsorbed by pre-synaptic neuron
Protein receptors on cell membrane
Ensures impulses travel in one direction only
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