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Ions within a neuron
Potassium (+), sodium (+), calcium (+), chloride (-)
Potassium
K (+)
Sodium
Na (+)
Calcium
Ca2 (+)
Chloride
Cl (-)
The cell contains
Negative proteins, potassium, trace amounts of other ions, negative charge
Cell charge at rest
About -70 mv
Sodium Potassium/ATP Pump
Keeps the ion balance within the cell