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Question

Explain the biological importance of sodium and potassium?

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Solution

Biological Importance of Sodium

  • Sodium is used for the generation of nerves impulses and for maintenance of electrolyte balance and fluid balance.

  • Sodium ions are necessary for heart activities and certain metabolic functions. Health is affected when the body has too much and too little sodium.

  • They are needed for the transport of sugars and amino acids into the cells

Biological Importance of Potassium

  • Potassium ions are primarily found inside the cell.

  • Potassium ions maintain the osmolarity (the concentration of a solution expressed as the total number of solute particles per liter) of the cell. They also regulate the opening and the closing of the stomata.

  • Potassium ions act as cofactors for certain enzymes such as pyruvate kinase.

  • Potassium is important in heart function and in skeleton and muscle contraction.

  • Diets with low potassium lead to hypertension.

  • It maintains the electrolyte balance in the body.


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