ESPS is due to: (A) K+ influx, (B) Na+ efflux, (C) Na+ influx, (D) Ca++ influx
Answer is C. 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