Question

What is diffusion and how does it occur?

Answer 1

Diffusion, without stirring or shaking the liquids, is a normal and physical phenomenon that exists on its own. When the ions are able to travel spontaneously, the liquid and gases undergo diffusion. The molecules clash and modify the trajectory of each other.

Complete answer:
The mechanism of migration of molecules under a gradient of concentration is diffusion. It is a significant mechanism that exists in all living organisms. In the flow of chemicals in and out of the cells, diffusion assists. The molecules shift from a higher-concentration region to a lower-concentration region until the entire concentration becomes equal. When the ions are able to travel spontaneously, the liquid and gases undergo diffusion.
In different disciplines, such as biology, physics, chemistry, etc., diffusion is commonly used. It is possible to distinguish diffusion into two key types: simple diffusion and facilitated diffusion.

1.Simple diffusion: A mechanism through which the material passes through a semipermeable membrane or a solvent without the assistance of protein transport. For starters, by basic diffusion, bacteria deliver small nutrients, water and oxygen into the cytoplasm.
2.Facilitated diffusion is a passive passage of molecules by means of a carrier molecule through the cell membrane from the higher concentration region to the lower concentration region.

Note: Dialysis: This is the diffusion of solutes through a membrane that is selectively permeable. A selectively permeable membrane is one that enables the passage of only particular ions and molecules, thus obstructing the flow of others.