YoungActivist6842 YoungActivist6842

27-09-2017
Biology

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How do cardiac cells sustain a membrane potential of around 0 mv during the long plateau phase?

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barnuts barnuts

10-10-2017

They are actually assisted by the Na + / Ca 2+ exchanger. This specific exchanger produces an inward (or depolarizing) current which helps sustain the membrane potential near 0 mV. This is achieved by moving 3 Na + into the cell for every 1 Ca2+ out.

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