5. Sodium-potassium pump: Protein mechanism found along the neuron membrane which transports 3 Na+ ions outside of the cell while also drawing 2 K+ ions into the cell; this is an active transport mechanism (requires energy (ATP) to function). 6.
What Is the Population Density of the United States? The population density of the United States is approximately 87.4 people per square mile, according to the 2010 U.S. Census. What Is the Most Densely Populated Continent? Perhaps not surprisingly, the most densely populated continent is Asia. Here are the population densities of the continents: 1  North America - 32 people per square mile. 2  South America - 73 people per square mile. 3  Europe - 134 people per square mile. 4  Asia - 203 people per square mile. 5  Africa - 65 people per square mile. 6  Australia - 6.4 people per square mile.
The estimated population of the United States of America is 315,203,000 as of 2012. The USA population map shows the population distribution of each state, represented on the color-coded map.States with the highest population include California at number one, followed by Texas, New York, Florida, and Illinois. These states are also home to the most populous cities in the United States.The most populous cities in the United States are New York City, followed by Los Angeles, Chicago, and Houston.tates with the highest population include California at number one, followed by Texas, New York, Florida, and Illinois. These states are also home to the most populous cities in the United States. The most populous cities in the United States are New York City, followed by Los Angeles, Chicago, and Houston.