True regarding Na+ ion -
Responsible for Donnan effect
Responsible for Resting membrane potential
Responsible for Depolarization
Does not help other ions in transport
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.