This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Resting membrane potential of neurons is about 
Select and explain. 
A. +60mv, B. +70mv, C. -60mv, D. -70mv
D: -70mv
Answer: D: -70mv 
Explanation: A membrane potential results from separation of positive and negative charges across the cell membrane. In neurons, the resting membrane potential is usually about –70 mV, which is close to the equilibrium potential for K+