The resting surface charge density of a membrane is 0.5 uC/cm^2.The resting membrane potential is 0.5 V. It drops to 0 V in 5 ms.If there are 25 Na channels per um^2 that open up duringdepolarization, what is the average current that flows through asodium channel during this time (5 ms)? How many sodium ions movethrough the channel in 5 ms?
