Definition For Simple Diffusion

The spontaneous mixing of the molecules or ions of two or more substances resulting from random thermal motion.

Definition for simple diffusion. In biology simple diffusion is a form of diffusion that does not require the assistance of membrane proteins. Simple diffusion is a type of passive transport which as the name suggests is simply the movement of solute which occurs when its electrochemical potentials on the two sides of a permeable barrier are different. This type of diffusion occurs without any energy and it allows substances to pass through cell membranes. However its movement does not need a membrane protein that will help substances to move downhill.

Its rate is proportional to the concentrations of the substances and it increases with the temperature. In essence the particle or substance moves from higher to lower concentration. Simple diffusion is defined as the movement of substances like ions atoms and molecules from an area of their higher concentration to lower concentration without the involvement of any other molecules like a carrier protein. Water molecules move in to surround individual solute molecules which maximizes hydrogen bonding.

Diffusion in the process of diffusion of a single solute a concentration of molecules on one side of a membrane top will move through a membrane center until there is equilibrium on both sides bottom. In a solution or gas that has an area of high numbers of particles and an area of lower numbers of particles the particles will diffuse or move from the area of higher to the area of lower. The state or process of being widely spread. Simple diffusion is carried out by the actions of hydrogen bonds forming between water molecules and solutes.

Diffusion happens in liquids and gases because their particles move randomly from place.