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Diffusion refers to the net movement of molecules from higher to lower concentration. Diffusion may be a simple diffusion or facilitated diffusion. A simple diffusion is one in which that occurs unassisted. Facilitated diffusion in contrast is an assisted diffusion in a way that it requires a carrier molecule. For instance, polar molecules diffuse across a cell membrane through carrier molecules in the cell membrane.
https://www.biology-online.org/dictionary/Facilitated_diffusion
diffusion (di·fyōōˑ·zhn), 1  n the tendency of molecules within a gas or liquid to move from an area of higher concentration to one with lower concentration. The rate of movement depends on the size and weight of the molecules involved.
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A condition of stable internal environment despite a changing external environment. Negative feed back, shuts off initial stimulus (house thermostat) Positive feed back effectors increase stimulus (during pregnancy)
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diffusion (di·fyōōˑ·zhn), 1  n the tendency of molecules within a gas or liquid to move from an area of higher concentration to one with lower concentration. 2  1. Scattering of light passing through a heterogeneous medium, or being reflected irregularly by a surface, such as a sandblasted opal glass surface.
http://medical-dictionary.thefreedictionary.com/Simple+diffusion
Facilitated Diffusion passive transport Movement of particles from high consentration to low consentration through a protein carrier. Osmosis passive transport
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The tendency of the molecules of a substance (gas, liquid, or solid) to move from a region of high concentration to one of lower concentration. In the body, oxygen and carbon dioxide move by diffusion. The diffusion of water to an area of greater solute concentration is called osmosis.
http://medical-dictionary.thefreedictionary.com/Simple+diffusion
the movement of molecules of a particular substance from regions of high concentration to regions of low concentration of that substance, i.e. down a CONCENTRATION GRADIENT. The rate of diffusion in gases is much greater than in liquids, due to differences in their molecular structure.
http://medical-dictionary.thefreedictionary.com/Simple+diffusion
An example of diffusion in biological system is diffusion of oxygen and carbon dioxide across the alveolar-capillary membrane in mammalian lungs. Diffusion may be a simple diffusion or facilitated diffusion. A simple diffusion is one in which that occurs unassisted. Facilitated diffusion in contrast is an assisted diffusion in a way that it requires a carrier molecule. For instance, polar molecules diffuse across a cell membrane through carrier molecules embedded in the cell membrane.
https://biology-online.org/dictionary/Diffusion
2. the spontaneous mixing of the molecules or ions of two or more substances resulting from random thermal motion; its rate is proportional to the concentrations of the substances and it increases with the temperature.
http://medical-dictionary.thefreedictionary.com/Simple+diffusion
what does simple diffusion mean
A simple diffusion is one in which that occurs unassisted.