??????????
??????1.??????????[K+]i/[K+]e?????????????????????????????????????????????
?????????????????????????????[K+]i/[K+]e???????????[K+]i/[K+]e?????????????????????????
2.?
??????????????K+???K+?????????????????3mmol/L??????????????potassium conductance??????????????????????????????????2?????????????????3?????????????????3???3???????????0?????????????2?S-T???3?T??????U???Q-T?
??????-????????3????-90mV?Ik?????????????????????????????0????????????????????????????
????????????????0??????????????P-R??????...
?????????????????????????????[K+]i/[K+]e???????????[K+]i/[K+]e?????????????????????????
2.?
??????????????K+???K+?????????????????3mmol/L??????????????potassium conductance??????????????????????????????????2?????????????????3?????????????????3???3???????????0?????????????2?S-T???3?T??????U???Q-T?
??????-????????3????-90mV?Ik?????????????????????????????0????????????????????????????
????????????????0??????????????P-R??????...
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