Water, minerals and trace elements - Sodium and potassium - Sodium and potassium in the body

5 important questions on Water, minerals and trace elements - Sodium and potassium - Sodium and potassium in the body

Why is the right balance of sodium/potassium outside/inside cell necessary for proper cell functioning?

Because this balance creates the membrane potential

What happens in the process of depolarization of the cell?

The decrease in negative charge inside the cell after the influx of positively charged sodium ions

How is the resting potential restored after depolarization of the cell membrane?

By the opening of special channels in the membrane that transport sodium from the inside to the outside the cell; and potassium from the outside to the inside of the cell
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Why are sodium and potassium important for the fluid balance in the body?

Sodium and potassium make sure that fluid is properly distributed over the 3 areas: interstitial fluid, blood fluid, and cell fluid

What is edema and how is it caused?

Edema is a condition in which there is excessive fluid build-up in a tissue as a result of changes in the sodium concentrations of the blood and interstitial fluid

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