Simple diffusion is defined as the process in which a substance moves through a semipermeable membrane or in a solution without any help from transport proteins.
Certain molecules in the cell use simple diffusion to travel in and out of the cell.
Examples of such molecules include urea, ethanol, and oxygen.
Diffusion is an important process, which is involved in the different life processes.
It is the net movement of particles, ions, molecules, solution, etc.
In all living species, diffusion plays an important role in the movement of the molecules during the metabolic process in the cells.
Diffusion is important for the following reasons:
The process of respiration, this process helps in diffusing the carbon dioxide gas out through the cell membrane into the blood.
Diffusion also occurs in plant cells. In all green plants, water present in the soil diffuses into plants through their root hair cells.
The movement of ions across the neurons that generates electrical charge is due to diffusion.