Electrical

At a particular instant of the cardiac cycle, p is located at the midpoint of a line connecting two electrodes that are 50 cm apart, and p is parallel to that line. At that instant the magnitude of the potential difference between the electrodes is 1.5 mV and the potential change within the cells has magnitude 90 mV.

(a) What is the magnitude of p? considering Electrical conductivity as 0?

(b) If σi/σo = 10, what is the cross-sectional area of the advancing region of depolarization?

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