AP BIOLOGY

Detailed explanation-1: -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.

Detailed explanation-2: -Water moves from areas of higher water potential to areas of lower water potential (i.e. towards the more negative, concentrated region). This will occur until the water potential inside the cell equals the water potential outside of the cell.

Detailed explanation-3: -The water potential of the plant cell will also be equal to the water surrounding it, and there will be no net movement of water molecules. water potential. At this concentration there is no net gain or loss of ater from the tissue.

Detailed explanation-4: -Turgor pressure: When (a) total water potential (total) is lower outside the cells than inside, water moves out of the cells and the plant wilts. When (b) the total water potential is higher outside the plant cells than inside, water moves into the cells, resulting in turgor pressure (p), keeping the plant erect.

Detailed explanation-5: -So if a cell is kept in an isotonic solution, then the net movement of water across the cell will be zero. Hence, the water potential and the solute potential will be equal since, water potential is equal to solute potential at normal temperature and atmospheric pressure.