Before attempting this one, see Insight 16.1, Electric Potential and Nerve Signal Transmission and Learn by Drawing
Question:
(a) How much work does it take for the pump to move the first sodium ion?
(b) Estimate the electric field (including direction) in the membrane under these conditions.
(c) Estimate the force on that first sodium ion.
(d) What is the electric field (including direction) under normal conditions when the voltage across the membrane is – 70mV?
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