Answer:
Hypotonic solutions are more dilute, hypertonic solutions have more solute, i.e. are more concentrated.
If the medium surrounding a cell has a higher water concentration than the cell, meaning that outside solution is very dilute, the cell will gain water by osmosis. Such a solution is known as a hypotonic solution.Water molecules are free to pass across the cell membrane in both directions, but more water will come into the cell than will leave.The result is that water enters the cell.The cell is likely to swell up.
If the medium has a lower concentration of water than the cell, meaning that it is very concentrated solution, the cell will lose water by osmosis. Such a solution is known as a hypertonic solution. Again,water crosses the cell membrane in both directions,but this time more water leaves the cell than enters it. Therefore, the cell will shrink.