Osmosis is the diffusion of water in cells. The definition of diffusion is:' Diffusion of a solvent (usually water molecules) through a semipermermeable membrane from an area of a low solution to an area of high solute concerntration.
The purpose of the plasma membrane is to allow matererials to pass into and out of cells. It's like a boundry or gate, and only lets certain substances in. The plasma membrane plays a huge role in osmosis and diffusion.
The purpose of the plasma membrane is to allow matererials to pass into and out of cells. It's like a boundry or gate, and only lets certain substances in. The plasma membrane plays a huge role in osmosis and diffusion.
'Hypertonic' is a term used for when the concerntration of a cell is higher than the concerntation outside the cell, whereas 'hypotonic' is a term used for when the cell's concerntation is lower than outside the cell. 'Isotonic' means when the concerntation of the cell is the same as outisde the cell. This is crucial for keeping the cell alive and working. If the cell's concerntration is too high, it can burst. On the other hand, if the cell's concerntration is too low, it can shrivel up.
The definition of diffusion is the movement of a substance from a low concerntration to a high concerntration. Hydrophilic (water-loving) and hydrophobic (water-hating) substances line the cell membrane, and chanel proteins allow water molecules to pass from one side to the other. Oxygen and water can easily get to and from cell to cell very eaily, but other materials need more energy and time to be transported. |
|