This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
Resting membrane potential is generated by 
Select and explain. 
A. Na+, B. K+, C. Cl-, D. CA2+
B: K+
Answer: B: K+ 
Explanation: Potassium ion is responsible for resting membrane potential. When concentration of potassium ion is varied in the extracellular fluid, resting membrane potential changes. But not with Na ion. (REF. TEXTBOOK OF MEDICAL PHYSIOLOGY GEETHA N 2 EDITION, PAGE NO - 23)