True regarding Na+ ion -: (A) Responsible for Donnan effect, (B) Responsible for Resting membrane potential, (C) Responsible for Depolarization, (D) Does not help other ions in transport
Answer is C. 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.