What is the role of potassium in the body?

Potassium plays several vital roles in the body, making it essential for overall health. One of its key functions is regulating blood pressure. Potassium helps balance sodium levels in the body; higher potassium intake is associated with lower blood pressure, as it can promote vasodilation and reduce tension in blood vessel walls.

Additionally, potassium is crucial for maintaining fluid balance. It works alongside sodium to help control the amount of water in and around cells, contributing to overall hydration and the proper functioning of cells and tissues.

Moreover, potassium is critical for muscle contractions. It is involved in the transmission of electrical signals in the body, which is necessary for muscle contractions and nerve signaling. An adequate supply of potassium ensures that muscles, including the heart muscle, function properly.

Therefore, since potassium is integral to regulating blood pressure, maintaining fluid balance, and assisting with muscle contractions, the correct answer encompasses all these important roles.