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Chapter 5

BioPsych Chapter 5

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BioPsych Chapter 4Neural Conduction and Synaptic Transmission 41Resting Membrane Potential Membrane Potentialthe difference in electrical charge between the inside and the outside of a cell Recording the Membrane Potential Microelectrodes intracellular electrode one gets inserted inside the neuron and one outside the neuron in the extracellular fluidthis is to record a neurons membrane potential Resting Membrane Potential When both electrodes are in the extracellular fluid the voltage difference between them is zero When inserted into a neuron a steady potential of about 70 millivolts mV is recorded The potential inside the resting neuron is 70 mV less than that of the outside This is called the resting membrane potential Ionic Basis of the Resting Potential The resting potential results from the fact that the ratio of negative to positive charges is greater inside the neuron than outside This can be understood by four factorsoRandom Motionthe ions are in constant random motion and are more likely to move do
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