AP BIOLOGY

Detailed explanation-1: -In an isotonic environment, there is no net water movement, so there is no change in the size of the cell.

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 solutions contain equal concentrations of impermeable solutes on either side of the membrane and so the cell neither swells nor shrinks.

Detailed explanation-4: -Osmosis is the concept that involves the moment of water molecules inside and outside of the cell. Isotonic solution is the one in which the concentration of solute and water molecules are in equilibrium. If the cell is placed in isotonic solution the net change will be zero. So, the cells retain their size.

Detailed explanation-5: -2.221. Osmotic lysis with a hypotonic solution causes the cells to swell and burst. Swelling of the cell, caused by the inward movement of water, may also enhance the uptake of detergents into the cellular membrane.