Here are the essential concepts you must grasp in order to answer the question correctly.
Isotonic Solutions
Isotonic solutions have the same solute concentration as the inside of a cell, resulting in no net movement of water across the cell membrane. In the case of red blood cells, an isotonic solution maintains their shape and function, preventing swelling or shrinking.
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Hypotonic Solutions
Hypotonic solutions have a lower solute concentration compared to the inside of a cell. When red blood cells are placed in a hypotonic solution, water enters the cells, causing them to swell and potentially burst due to osmotic pressure.
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Hypertonic Solutions
Hypertonic solutions have a higher solute concentration than the inside of a cell. When red blood cells are exposed to a hypertonic solution, water exits the cells, leading to cell shrinkage or crenation as the cell loses water to the surrounding environment.
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