Potassium

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Term Paper Title	Potassium
# of Words	638
# of Pages (250 words per page double spaced)	2.55

Potassium

Potassium
     Potassium is a vital element in the human body. Potassium had never been distinguished between sodium until the eighteenth century. Before potassium was recognized as an element, potassium carbonate was mixed with animal fat to make soap.
It was discovered by Sir Humphrey Davy in England, in 1807.  Sir Davy was able to isolate potassium using electrolysis. Potassium was the first metal isolated by this procedure.  Today, it is still not found free in nature.  It is obtained by electrolysis of chloride or hydroxide.
     Potassium is a solid silvery white element.  It is soft and can be cut with a knife.  Potassium is the least dense known metal, besides lithium.  It is the seventh most abundant element.  It makes up about 1.5% by weight of the earth's crust.  It decomposes in water because of the hydrogen.   It usually catches fire during reaction with water.
     Potassium is an essential component for plant growth.  Potassium is absorbed by plants in larger amounts than most other mineral elements.  Potassium is supplied to plants by soil minerals, organic materials, and inorganic fertilizer.  Potassium is not found in organic combination with plant tissues.  Potassium plays an essential role in the metabolic processes of plants.  Potassium also is essential in carbohydrate metabolism, a process by which energy is obtained from sugar.
     Potassium is one of the most important elements in human diet.  To begin with, potassium works with sodium for various reasons.  For example, it helps to regulate body waste, control heart rhythms, and assist in reducing high blood pressure.  It also aids in clear thinking by sending oxygen to the brain.  This element is crucial to the maintenance of the nervous system and the muscular system.  Potassium is an electrolyte, and therefor regulates the balance of fluids inside and outside the cells, including blood.
     The human body needs potassium to function.  The body may become short of potassium in many situati...

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