Studying for a test. Anyone want to discuss depolarization and repolarization along an excitable membrane, preferably muscle and nervous tissue?

Question

anonymous · Answer

yes  but after half an hour ....my net wud be on then.shawnaton1 yahoo messenger or here if u prefer so in chat

anonymous · Answer

yes maybe now?

anonymous · Answer

Yeah. So how does repolarization chase depolarization?

anonymous · Answer

meaning?how does depolarisation occur?

anonymous · Answer

what do u mean by chase?

anonymous · Answer

na chnnels rapidly close.and remain in this closed state for a few milliseconds before returning to resting state.direction of eletrical gradient is reversed this prevents na influx.
voltage gated k channes  open slowly and is more prolonged.

anonymous · Answer

so k  moves out of cel even after na chanel closes.this k efflux helps complete repolarisaion

anonymous · Answer

whats ur doubt?

anonymous · Answer

That makes sense. Thanks.