True regarding Na+ ion: (A) Responsible for Donnan effect, (B) Responsible for resting membrane potential, (C) Responsible for depolarization, (D) Dose not help other ions in transport
Answer is C. Ans. (c) Responsible for depolarization(Ref: Guyton, 13th ed/p.65)Option 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