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.
Landforms are defined as the natural physical features found on the surface of the earth. Landforms are created as a result of the various forces of nature such as wind, water and ice and also by the movement of the earthâs tectonic plates. For example, due to these actions, the soil gets eroded and deposited somewhere far from the site of erosion, thus leads to the formation of different landforms.