# Which of the following positively-charged ions is about 28 times more concentrated inside of the cell than outside (useful for the action potential of a neuron)? chloride magnesium bicarbonate potassium calcium

Question

8. Which of the following positively-charged ions is about 28 times more concentrated inside of the cell than outside (useful for the action potential of a neuron)?

1. chloride
2. magnesium
3. bicarbonate
4. potassium
5. calcium