What is a characteristic of both sodium and potassium ions

A)  They carry a negative charge. 
B)  They are concentrated inside the neuron's cell body when it is at rest. 
C)  They carry a positive charge. 
D)  They are capable of changing their potentials.

Potassium Ions

Charged particles of potassium that play critical roles in bodily functions, including nerve transmission and muscle contraction.

Sodium Ions

charged atoms of sodium, essential for various physiological processes including muscle function and fluid balance.

Positive Charge

An electrical condition that occurs when an atom loses electrons, resulting in a surplus of protons, giving it a net positive electric charge.