AP BIOLOGY

Detailed explanation-1: -If the concentration of solution inside the cell and outside the cell is same, there will be no net movement of water molecules. Such type of solution is called isotonic.

Detailed explanation-2: -Yes, the rate of solute movement into and out of the cell is equal at equilibrium. When a cell is at osmotic equilibrium, the concentration of solutes inside and outside of the cell are equal, and they remain equal over time.

Detailed explanation-3: -Isotonic means there is the SAME concentration of solute molecules. outside the cell as inside.

Detailed explanation-4: -In this case where the two solutions (inside and outside the cell) have equal solute concentrations they would be isotonic.

Detailed explanation-5: -During diffusion, when the concentration of molecules on both sides of a membrane is the same, the molecules will continue to move across the membrane in both directions.