This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Hyperpolarization is due to 
Select and explain. 
A. Influx of chlorine, B. Influx of potassium, C. Influx of sodium, D. All
A: Influx of chlorine
Answer: A: Influx of chlorine 
Explanation: In hyperpolarization the membrane becomes more negative It is due to continued potassium efflux or chloride ion influx. Ref:Guyton and Hall textbook of medical physiology 12th edition,page number:67,68,69