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  • Depends on the organism. Generally under an unfavourable condition.

  • Homeostasis is when the conditions inside and outside are balanced.

    In a cell, it is usually when the saline concentration inside and outside the cell wall are equal. The cell will give up water when the environment is more saline until the concentration inside the cell is equal to the environment.

    If the environment is lower in concentration, it will absorb water, sometimes until the cell bursts. This is called cytolysis or osmotic lysis or sometimes just hydrolysis (which is technically inaccurate), and is why salt-water fish will die a painful death and swell up when you put them in fresh water.

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