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.
Portland is a city in and the county seat of Jay County, Indiana, United States. The population was 6,223 at the 2010 census. Portland is located at 40Â°26â²2â³N 84Â°58â²48â³W / 40.43389Â°N 84.98Â°W / 40.43389; -84.98 (40.433884, -84.979914), along the Salamonie River. According to the United States Census Bureau, the city has a total area of 4.1 square miles (10.6 kmÂ²), of which, 4.1 square miles (10.6 kmÂ²) of it is land and 0.24% is water.