This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nervous System, Subject name: Physiology
[{'content': 'ESPS is due to \nSelect and explain. \nA. K+ influx, B. Na+ efflux, C. Na+ influx, D. Ca++ influx', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. (c) Na+ efflux(Ref: Ganong, 25th ed/p.122)Excitatory Post Synaptic Potentials (EPSP)#Produced if the neurotransmitter released at the synapse is excitatory#The excitatory transmitter opens mainly Na+ ion channels producing depolarization', 'role': 'assistant'}]