What ionic movement is most commonly responsible for generating an excitatory postsynaptic potential (EPSP)?
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Correct answer: Na⁺ or Ca²⁺ influx
EPSPs are generally produced when neurotransmitter binding opens ion channels that allow positive ions (e.g., Na⁺ or Ca²⁺) to enter the postsynaptic neuron, depolarizing the membrane.
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