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“Can you weigh the electricity in a cat?” I thought cats had an extra share of electricity, because of their hair-raising act. Peter disappointed me by saying electricity can’t be measured that way. It’s inside the body, but the whole animal itself is grounded. I didn’t know what that meant but I took his word for it. For the first time, I heard about the excitatory nervous system, the inhibitory nervous system, membranes, axons, synapses, negative potentials, sodium and potassium, and how a disproportionate amount of chemicals inside and outside the cell made for the electrical potential across the membrane.