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
Upstroke of action potential would lead to 
Select and explain. 
A. Net current in an outward direction, B. Cell interior becomes more negative, C. Cell interior becomes less negative, D. None of the above
C: Cell interior becomes less negative
Answer: C: Cell interior becomes less negative 
Explanation: None