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15 cards from this deck
Movement of ions across neuron membrane
Minimum stimulus to start a nerve impulse
No effect
Impulse size unaffected by stimulus size (above threshold)
No. of neurons stimulated & frequency of impulses
Inside positive, outside negative
Time needed to recover before sending another impulse
Increases speed via jumping between nodes of Ranvier
Greater diameter = faster impulse
Where two neurons come into close contact
Tiny gap between two neurons in a synapse
Noradrenaline, dopamine
Broken down by enzymes OR reabsorbed by pre-synaptic neuron
Ensures impulses travel in one direction only
Needed for ionic changes during impulse
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