What is the relationship between diffusion and osmosis? By definition, what is the only substance that undergoes osmosis?
Diffusion and osmosis are both processes that involve the movement of molecules from an area of higher concentration to an area of lower concentration. However, there is a key difference between the two processes.
Diffusion is the movement of any type of molecule, while osmosis specifically refers to the movement of water molecules across a selectively permeable membrane. Therefore, water is the only substance that undergoes osmosis.
In summary, osmosis is a specific type of diffusion that involves the movement of water molecules.