Explanation: Diffusion and osmosis are both examples of passive transport which do not require energy. Hope this helps! Related questions How does polarity of molecules affect diffusion? How does diffusion differ from endocytosis and exocytosis? How does diffusion affect homeostasis? How are diffusion and osmosis different? The slideshow shows an example of osmosis:. Osmosis experiment. The beaker contains water and sugar molecules.
Water molecules pass through from solution one to two. If the two containers are connected, but separated by a semi-permeable membrane, water molecules would flow from the area of high water concentration the solution that does not contain any sugar to the area of lower water concentration the solution that contains sugar. This movement of water would continue until the water concentration on both sides of the membrane is equal, and will result in a change in volume of the two sides.
The side that contains sugar will end up with a larger volume. Water solutions are very important in biology. When water is mixed with other molecules this mixture is called a solution. Water is the solvent and the dissolved substance is the solute. A solution is characterized by the solute. For example, water and sugar would be characterized as a sugar solution. The classic example used to demonstrate osmosis and osmotic pressure is to immerse red blood cells into sugar solutions of various concentrations.
There are three possible relationships that cells can encounter when placed into a sugar solution. The concentration of solute in the solution can be equal to the concentration of solute in cells. A red blood cell will retain its normal shape in this environment as the amount of water entering the cell is the same as the amount leaving the cell. The concentration of solute in the solution can be greater than the concentration of solute in the cells.
In this situation, a red blood will appear to shrink as the water flows out of the cell and into the surrounding environment. The concentration of solute in the solution can be less than the concentration of solute in the cells. A red blood cell in this environment will become visibly swollen and potentially rupture as water rushes into the cell. Description of Diffusion and Osmosis A water solution that contains nutrients, wastes, gases, salts and other substances surrounds cells.
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