Hypotonic Solutions: Water Moves In A hypotonic solution has a lower concentration of solutes compared to the fluid inside the cell. Plant cells, however, benefit from this pressure, becoming turgid and firm, which provides structural support.
Isotonic Solution No Net Water Cell Movement
Defining Tonicity: The Core Concept Tonicity specifically refers to the ability of a solution to cause a cell to gain or lose water. Understanding the definitions of hypotonic, isotonic, and hypertonic is essential for anyone studying biology, physiology, or chemistry.
Because the solute concentration is higher intracellularly, water moves from the area of lower solute concentration (outside the cell) to the area of higher solute concentration (inside the cell). For animal cells, this influx of water causes the cell to swell and potentially burst, a process called lysis.
Isotonic Solution: No Net Water Movement Across the Cell Membrane
To balance the concentration gradient, water moves out of the cell and into the surrounding solution. Using a hypotonic solution intravenously could cause red blood cells to burst, while a hypertonic solution would cause them to collapse.
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