An isotonic solution refers to the state when two solutions have equal concentration of solutes across a semipermeable membrane. This state allows for the free movement of water without the dilution of solutes on either side and keeps cells functioning properly.

What are the conditions for an isotonic solution?

If a cell is placed in an isotonic solution, there will be no net flow of water into or out of the cell, and the cell's volume will remain stable. If the solute concentration outside the cell is the same as inside the cell, and the solutes cannot cross the membrane, then that solution is isotonic to the cell.

What is isotonic condition?

A solution is isotonic when its effective osmole concentration is the same as that of another solution. In biology, the solutions on either side of a cell membrane are isotonic if the concentration of solutes outside the cell is equal to the concentration of solutes inside the cell.