He has written for Foreign Policy,The Guardian, Foreign Affairs, Politico and a host of other publications. The Interpreter Joins RFE/RL. We are proud to announce that, starting January 1, 2016, The Interpreter will be a special project of Radio Free Europe/Radio Liberty.
1 Sodium plays a large role in fluid balance, with different variations of sodium determining the shift of water by osmosis from one area of the body to another.  Along with chloride and bicarbonate, sodium is important for the proper regulation of the acid-base balance of the body.
Potassium, along with sodium and calcium, functions as an electrolyte, which means that it balances the amount of fluid in the body and transmits the tiny electrical nerve impulses. Its role in transmitting electrical impulses gives potassium an important role in muscle contractions.otassium plays a vital role in normal nerve and muscle function. A low potassium level inhibits muscle relaxation, causing rigid muscles that lead to tension and impaired function.