In the emergency room, saline solutions often run into a person's vein. the saline solution must be:0.9% NaCI.
When a vesicle containing 0.1 MNa+MNa+ is placed in water, sodium ions diffuse and the vesicle shrinks. If a vesicle is placed in a solution that is inwardly hypertonic, the vesicle will shrink.
When cells are placed in a hypertonic solution, water will leave the cells and the person's vein will shrink. In an isotonic environment, the cell size does not change due to the lack of net water movement. When cells are placed in a hypotonic environment, water enters the cells causing them to swell.
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