Acell is in when solute concentrations inside and outside the cell are equal.

A cell is in isotonic condition when solute concentrations inside and outside the cell are equal. If there is low concentration on the outside of the cell, then this situation is known as hypotonic and this will result in the cell bursting. If the concentration of the solute outside the cell is high, then this situation is known as hypertonic and in all probability the cell will ultimately sink under this condition. These are the three kinds of conditions that can occur.

Abay where the river empties into the sea