How many quanta of acetylcholine ACh are required to depolar

How many quanta of acetylcholine (ACh) are required to depolarize the motor end plate from 80 mV to 70 mV if a miniature end plate potential (MEPP) is 0.4 mV?

Solution

Answer=10 quanta

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Depolymerisation   by 40 mV requires 100 quanta

Each quantum or vesicle depolarised the motor end plate by 0.4mV