As аn аctiоn pоtentiаl prоpagates along a nerve axon, it creates electric dipoles. What is the configuration of charges in these dipoles, and how do they relate to measurable surface potentials? The action potentials produced by excitable cells inside the body have no effect on surface measurements Equal distribution of charges that cancel out any measurable potentials Alternating positive and negative regions that only exist intracellularly Positive charges inside and negative charges outside at the active region; these dipoles generate current loops that create measurable potentials in the extracellular space