In its resting state, the neuron is more negative inside compared to outside. The resting membrane potential is -70 millivolts (mV). The reason for this is because of the distribution of charged ions :
The 2014 Portland, Maine, population is 66,235. There are 3,108 people per square mile (population density). The median age is 36.7. The US median is 37.2. 38.53% of people in Portland, Maine, are married. 13.81% are divorced. The average household size is 2.08 people. 27.60% of people are married, with children. 19.64% have children, but are single.
The highest monthly average temperature in Portland for July is 70 degrees. The lowest monthly average temperature in Portland for December is 39 degrees. The most monthly precipitation in Portland occurs in November with 6.1 inches. The air quality index in Portland is 23% better than the national average. The pollution index in Portland is 62% better than the national average.