The peak of fast EPSP or, fast IPSP is seen at what time after stimulus application:: (A) 0.5 ms, (B) 0.5 to 1.5 ms, (C) 11.5 ms, (D) 100-500 ms
Answer is B. Fast EPSP and fast IPSP begins 0.5 ms after the stimulus (known as latency). They peak 1-1.5 ms after the stimulus then decreases exponentially. Fast EPSP is due to influx of Na+ and or Ca++ in post synaptic neuron. Fast IPSP is due to influx of Cl- in post synaptic neuron.