True regarding Na+ ion -
Depolarization occurs due to sodium ions influx.
Potassium ions maintain the resting membrane potential.
Sodium ions are not responsible for Gibbs-Donnan effect. It is due to the non-diffusible anions.
Sodium ions take part in many co-transports.
Responsible for Donnan effect
Responsible for Resting membrane potential
Responsible for Depolarization
Does not help other ions in transport