Answer Happy

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.
Figure 11.8 Measuring membrane potential in neurons. Plasma membrane Microelectrode inside cell Voltmeter 70 AV + 1 T Neuron Ground electrode outside cell Axon