role of sodium and potassium in human body pdf

Role Of Sodium And Potassium In Human Body Pdf

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Sodium in diet

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Potassium is an essential mineral that is needed by all tissues in the body. It is sometimes referred to as an electrolyte because it carries a small electrical charge that activates various cell and nerve functions. Potassium is found naturally in many foods and as a supplement. Its main role in the body is to help maintain normal levels of fluid inside our cells. Sodium , its counterpart, maintains normal fluid levels outside of cells. Potassium also helps muscles to contract and supports normal blood pressure. The U.

The body uses sodium to control blood pressure and blood volume. Your body also needs sodium for your muscles and nerves to work properly. Sodium occurs naturally in most foods. The most common form of sodium is sodium chloride, which is table salt. Milk, beets, and celery also naturally contain sodium. Drinking water also contains sodium, but the amount depends on the source.

A primary care approach to sodium and potassium imbalance

Potassium is one of the main blood minerals, or electrolytes, essential to both cellular and electrical function. Along with sodium, potassium regulates the water balance and the acid-base balance in the blood and tissues, and plays a critical role in the transmission of electrical impulses in the heart. The active transport of potassium into and out of the cells is crucial to cardiovascular and nerve function. When potassium enters the cell, it instigates a sodium-potassium exchange across the cell membrane. In the nerve cells, this generates the electrical potential that allows the conduction of nerve impulses. When potassium leaves the cell, it restores repolarization to the cell, which allows the nerve impulse to progress.

Initially, quizzes are posted out with journals and GPs are invited to submit their answers for CME credits. Register or Log in to take part in quizzes. Don't have an account? Register to use all the features of this website, including selecting clinical areas of interest, taking part in quizzes and much more. This item is 9 years and 6 months old; some content may no longer be current. Interpreting and managing a laboratory result of abnormal sodium or potassium levels is a common scenario in general practice.

Potassium in biology

Potassium and sodium are electrolytes needed for the body to function normally and help maintain fluid and blood volume in the body. However, a person can get high blood pressure by consuming too much sodium and not enough potassium. Vegetables and fruits, such as potatoes, tomatoes, leafy greens, sweet potatoes, beans, and bananas; dairy products, such as yogurt; and seafood, such as salmon and clams, are good sources of potassium. One gram of salt sodium chloride equals milligrams of sodium.

Potassium is the main intracellular ion for all types of cells , while having a major role in maintenance of fluid and electrolyte balance. It is found in especially high concentrations within plant cells, and in a mixed diet, it is most highly concentrated in fruits. The high concentration of potassium in plants, associated with comparatively very low amounts of sodium there, historically resulted in potassium first being isolated from the ashes of plants potash , which in turn gave the element its modern name. The functions of potassium and sodium in living organisms are quite different. Animals, in particular, employ sodium and potassium differentially to generate electrical potentials in animal cells, especially in nervous tissue.

The Role of Potassium

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