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.
Since 2010, an estimated 116,168 people have moved to the Portland metropolitan area, more than the population of Gresham. That's a 5.2 percent growth rate from 2010 to 2014 â the 20th-fastest in the country among big cities, and fourth-fastest outside the Sun Belt.he Portland Metro UGB (in green) is only a portion of the U.S. Census Bureau's 7-county Portland metropolitan statistical area (orange). About 1.5 million of the region's estimated 2.3 million residents live within the UGB.