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 in ventricular myocardium 
Select and explain. 
A. -50mV, B. >70mV, C. +70mV, D. -90mV
D: -90mV
Answer: D: -90mV 
Explanation: Ventricular cardiomyocyte membrane potential is about -90 mV at rest, which is close to the potassium reversal potential. When an action potential is generated, the membrane potential rises above this level in four distinct phases.