A wave of depolarization propagates as diffusing sodium ions trigger adjacent sodium channels to open.
A wave of depolarization travels as diffusing sodium ions in the cytoplasm trigger opening of sodium channels in adjacent membrane regions.
| Front | Wave of depolarisation |
|---|---|
| Back | Some sodium ions the enter the neurone can diffuse sideways which causes sodium ion channels in next region to open and sodium ions diffuse into that region which causes a wave of depolarisation to move away from parts of the membrane in refractory period as they can't fire an action potential |
Learn with these flashcards. Click next, previous, or up to navigate to more flashcards for this subject.
Next card: Refractory period produced type impulses discrete
Previous card: Potential order events action formation stimulus depolarisation repolarisation
Up to card list: AQA Biology Flashcards