For a neuron to work properly, it needs to maintain a potentialdifference of 70 mV across the cell membrane - with the interior ofthe cell at a negative potential with respect to the outside.
1. Expand the region circled on the diagram and draw a model ofthat region here. We will treat the membrane as a capacitor.Since the cell is in the shape of a tube, we are not drawing thewhole thing - we are only modeling the wall on one side of the tube- the model goes from "inside" to "outside".
On your diagram, show the electric field lines and fiveequipotential lines - one at each plate, then three evenly spacedbetween the plates. Label the equipotential lines with theappropriate voltage, setting the outer wall of the membrane at 0V.
For A Neuron To Work Properly It Needs To Maintain A Potential Difference Of 70 Mv Across The Cell Membrane With The 1 (30.3 KiB) Viewed 46 times
Figure 11.8 Measuring membrane potential in neurons. Plasma membrane Microelectrode inside cell Voltmeter 70 AV + 1 T Neuron Ground electrode outside cell Axon
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