Topic 8 Key topics 0.0 / 5 ? BiologyHealth, illness and diseaseA2/A-levelEdexcel Created by: francesca_321Created on: 27-04-16 15:20 What does an impulse jump between? The nodes of ranvier 1 of 13 What does a stimulated axon allow? Sodium ion channels to open 2 of 13 What does this let? sodium ions diffues in 3 of 13 What does this cause? depolarisation 4 of 13 Where do sodium ions flow? between depolarised part and adjacent resting region 5 of 13 What opens? adjacent sodium ion channels open 6 of 13 What is generated? second action potential 7 of 13 What is the resting potential? Refractory period 8 of 13 When the rod cell absorbs light, what happens? Rhodopsin into retinal and opsin 9 of 13 What does the membrane become less permeable to? Na+ 10 of 13 What is still pumped out? Na+ 11 of 13 What becomes more negative? Inside 12 of 13 Less neurotransmitter is what? released 13 of 13
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