AP BIOLOGY

Detailed explanation-1: -In an isotonic solution, the flow of water in and out of the cell is happening at the same rate.

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: -Cells placed in a hypotonic solution will take in water across their membrane until both the external solution and the cytosol are isotonic. A cell that does not have a rigid cell wall, such as a red blood cell, will swell and lyse (burst) when placed in a hypotonic solution.

Detailed explanation-4: -Here water can be called hypotonic solution and salt solution can be called hypertonic solution. The movement occurs to balance concentration and form equilibrium.

Detailed explanation-5: -In biology, osmosis is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell’s partially permeable membrane.