<prompt> True regarding Na ionResponsible for Donnan effectResponsible for resting membrane potentialResponsible for depolarizationDose not help other ions in transport  <response>: Ans. c Responsible for depolarizationRef: Guyton, 13th edp.65Option a - Sodium ion is not Responsible for Donnan effect. This effect is due to non-diffusible anions like proteinsOption b - potassium ion is responsible for RMPOption d - many substances require sodium for their transport through secondary active transport processes 