As a result, per capita income in Northwest Arkansas has converged with the national average. As of 2012, income per capita in Northwest Arkansas was about $36,000, about $6,000 below the national average. After adjusting for the lower cost of living in the region, per capita income in Northwest Arkansas was at that time, in effect, $40,000, just $2,000 shy of the national average.
Protein channels are important to facilitate the transport of ions and other larger molecules across the plasma membrane.   Large molecules cannot just diffuse thorough the â¦ membrane. In addition, polar molecules cannot diffuse through the membrane since it would be energetically unfavorable for them to negotiate the hydrophobic interior of the plasma membrane. Therefore, protein channels are essential in membrane transport.
Best Answer: Channel proteins-amphipathic proteins (one end polar one end nonpolar) that allow for ions to pass through the membrane down their concentration gradient Transport proteins-proteins that change shape when they bind to a substrate and help facilitate diffusion of substances down their concentration gradient.ransport proteins move molecules through by active transport -- from lower concentration to higher concentration. 3. Proteins on the outer surface act as recognition molecules to help the organism recognize its own cells. 4. Proteins on the inner surface provide anchorage points for the cytoskeleton.