Simple diffusion
Simple Diffusion
Simple diffusion (pronunciation: /ˈsɪmpl dɪˈfjuːʒən/) is a type of passive transport in biology that does not require energy. It is the process by which molecules or ions move from an area of higher concentration to an area of lower concentration.
Etymology
The term 'simple diffusion' is derived from the Latin words 'simplus', meaning 'single', and 'diffundere', meaning 'to spread out'.
Process
In simple diffusion, substances move down their concentration gradient, from an area of high concentration to an area of low concentration. This process continues until the concentration of the substance is equal in all areas, a state known as equilibrium.
Factors Affecting Simple Diffusion
Several factors can affect the rate of simple diffusion, including the size of the molecules or ions, the temperature, the concentration gradient, and the properties of the membrane through which the substances are diffusing.
Related Terms
- Passive transport: The movement of substances across cell membranes without the need for energy input.
- Concentration gradient: The gradual change in the concentration of solutes in a solution over a distance in a direction of higher to lower concentration.
- Equilibrium: The state in which the concentrations of the diffusing substance in the two regions are equal.
See Also
External links
- Medical encyclopedia article on Simple diffusion
- Wikipedia's article - Simple diffusion
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