Prab at 18:24, 18 March 2025

2025-03-18T18:24:07Z

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'''Absorption''' is a process in which one substance takes in or assimilates another substance. This term is widely used in various scientific fields, including [[chemistry]], [[biology]], and [[physics]].

==Types of Absorption==
Absorption can be classified into different types based on the context in which it occurs:

===Chemical Absorption===
In [[chemistry]], absorption refers to the process by which one substance permeates another. This is different from [[adsorption]], where the molecules adhere only to the surface of the material. Chemical absorption often involves a chemical reaction between the absorbed substance and the absorbing medium.

===Biological Absorption===
In [[biology]], absorption is the process by which living organisms take in substances from their environment. For example, in the human body, the [[small intestine]] absorbs nutrients from digested food. Similarly, [[plants]] absorb water and minerals from the soil through their [[roots]].

===Physical Absorption===
In [[physics]], absorption refers to the process by which a material takes in energy from electromagnetic waves or particles. For instance, when light passes through a medium, some of its energy is absorbed, leading to phenomena such as [[attenuation]] and [[thermal energy]].

==Mechanisms of Absorption==
The mechanisms of absorption can vary depending on the type of substance and the medium involved:

===Diffusion===
Diffusion is a common mechanism in both chemical and biological absorption. It involves the movement of molecules from an area of higher concentration to an area of lower concentration. This process continues until equilibrium is reached.

===Active Transport===
In biological systems, active transport is a mechanism that requires energy to move substances against their concentration gradient. This is essential for the absorption of certain nutrients and ions in the body.

===Capillary Action===
Capillary action is a mechanism observed in plants, where water and nutrients are absorbed through tiny tubes called [[xylem]] vessels. This process is driven by the adhesive and cohesive properties of water.

==Applications of Absorption==
Absorption has numerous applications across different fields:

===Medical Applications===
In medicine, absorption is crucial for the delivery of drugs and nutrients. For example, the absorption of oral medications in the [[gastrointestinal tract]] determines their bioavailability and effectiveness.

===Industrial Applications===
In industry, absorption processes are used in various applications such as gas purification, where contaminants are absorbed by a liquid solvent.

===Environmental Applications===
In environmental science, absorption plays a role in the removal of pollutants from air and water. For instance, activated carbon is used to absorb harmful chemicals from wastewater.

==Related Pages==
* [[Adsorption]]
* [[Diffusion]]
* [[Active transport]]
* [[Capillary action]]
* [[Xylem]]
* [[Gastrointestinal tract]]
* [[Bioavailability]]

==See Also==
* [[Permeability]]
* [[Solubility]]
* [[Osmosis]]
* [[Filtration]]

[[Category:Chemistry]]
[[Category:Biology]]
[[Category:Physics]]
[[Category:Medical terminology]]

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Absorption - Revision history

Prab at 18:24, 18 March 2025

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