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: -An isotonic solution is one that has the same concentration as another solution. If two solutions are separated by a semipermeable membrane, solution will flow in equal parts. As the concentration of solute and solvents are the same.

Detailed explanation-3: -An isotonic solution has the same solute concentration compared to the intracellular solute concentration. When a red blood cell is placed in an isotonic solution, there will be no net movement of water.

Detailed explanation-4: -The external solution having the same concentration as that of cell sap is known as an isotonic solution. When cells are in an isotonic solution, the movement of water out of the cell is exactly balanced by the movement of water into the cell.

Detailed explanation-5: -In this case where the two solutions (inside and outside the cell) have equal solute concentrations they would be isotonic.