Regarding ions, which of the following statements is TRUE?
a. Ions are found only on the outside of the neuron until it is activated.
b. Ions have a neutral charge, neither positive nor negative, until they are activated.
c. When a neuron is inactive (or resting), more "plus" charges exist outside the neuron and more "minus"
charges exist inside.
d. Ions can be found only inside the neuron, which creates in your brain an electronic charge of about -10 millivolts.
ANSWER: c
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