Sodium (Na) in Blood. Guide. A sodium test checks how much sodium is in the blood. Sodium is both an electrolyte and mineral. It helps keep the water (the amount of fluid inside and outside the body's cells) and electrolyte balance of the body. Sodium is also important in how nerves and muscles work.hy It Is Done. A blood test to check sodium levels is done to: 1  Check the water and electrolyte balance of the body. 2  Find the cause of symptoms from low or high levels of sodium.
Many of the lakes on the Canadian Shield, including those of the Great Lakes, were created by glacial erosion. Glacial Deposition A large part of the surface of a glacier is covered with a coating of sediment and rock debris.
1 Dune ridges:- In areas of large-scale dune activity, certain types of dunes result in sand ridges. 2  Moraines and eskers:- Glacial activity may leave ridges in the form of moraines and eskers. 3  An arete arÃªte is a thin ridge of rock that is formed by glacial.  erosionidges are usually termed hills or mountains as well, depending on size. There are several main types of ridges:-. 1  Dendritic ridge:- In typical dissected plateau terrain, the stream drainage valleys will leave intervening ridges.