Question

What is a normal concentration of salt and extracellular fluid? What happens to cells if the saltiness of the extracellular fluid increases or decreases?

Answer 1

The normal concentration of salt and extracellular fluid is 0.1% relative to the extracellular fluid. The ratio is intracellular fluid concentration to extracellular fluid concentration.

The following happens to cells if the saltiness of the extracellular fluid increases or decreases-

If the saltiness decreases, then the concentration of water outside in extracellular fluid is higher, hence the water moves inside the cell and bulges.

If the saltiness increases, then the concentration of water inside the cell is higher and water moves from lower salt concentration to higher salt concentration. Hence the cells become flaccid and shrinks.

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