AP BIOLOGY

Detailed explanation-1: -Isotonic means a solution with the same concentration as the cell. Hence water will move in and out of the cell at equal rates, so that the net movement of water is zero.

Detailed explanation-2: -When a red blood cell is placed in an isotonic solution, there will be no net movement of water. Both the concentration of solute and water are equal both intracellularly and extracellularly; therefore, there will be no net movement of water towards the solution or the cell.

Detailed explanation-3: -Isotonic Solution Water molecules do freely move in and out of the cell, however, and the rate of movement is the same in both directions.

Detailed explanation-4: -Water molecules will move from the side of higher water concentration to the side of lower concentration until both solutions are isotonic. At this point, equilibrium is reached.

Detailed explanation-5: -A hypertonic solution has increased solute, and a net movement of water outside causing the cell to shrink. A hypotonic solution has decreased solute concentration, and a net movement of water inside the cell, causing swelling or breakage.