Question

Why does it matter if the root is in a hypertonic or hypotonic solution?

Answer 1

Hypertonic Solution
•Greater concentration of solute outside of cell than inside
•Water potential is higher; osmotic potential is lower
•Net movement of water from the cell to the solution across a semi-permeable membrane
•In excess, causes crenation in animal cells and plasmolysis in plant cells

Hypotonic Solution
•Greater concentration of solute inside cell than outside
•Water potential is low (0 in distilled water); osmotic potential is higher
•Net movement of water into the cell from the solution across a semi-permeable membrane
•A pure water solution (DH2O) can cause lysis (bursting) in animal cells and turgor pressure in plant cells