Reaction may refer to a process or to a
response
Response may refer to:
*Call and response (music), musical structure
*Reaction (disambiguation)
*Request–response
**Output (computing), Output or response, the result of telecommunications input
*Response (liturgy), a line answering a versicle
...
to an action, event, or exposure:
Physics and chemistry
*
Chemical reaction
A chemical reaction is a process that leads to the IUPAC nomenclature for organic transformations, chemical transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the pos ...
*
Nuclear reaction
In nuclear physics and nuclear chemistry, a nuclear reaction is a process in which two atomic nucleus, nuclei, or a nucleus and an external subatomic particle, collide to produce one or more new nuclides. Thus, a nuclear reaction must cause a t ...
*
Reaction (physics) As described by the third of Newton's laws of motion of classical mechanics, all forces occur in pairs such that if one object exerts a force on another object, then the second object exerts an equal and opposite reaction force on the first. The th ...
, as defined by Newton's third law
*
Chain reaction (disambiguation)
A chain reaction in chemistry or physics is a sequence of reactions where a reactive product or by-product causes additional reactions to take place.
Chain reaction or The Chain reaction may also refer to:
Media
* Chain Reaction (game show), ''Ch ...
.
Biology and medicine
*
Adverse drug reaction
*
Allergic reaction
Allergies, also known as allergic diseases, refer a number of conditions caused by the hypersensitivity of the immune system to typically harmless substances in the environment. These diseases include hay fever, food allergies, atopic derma ...
*
Reflex
In biology, a reflex, or reflex action, is an involuntary, unplanned sequence or action and nearly instantaneous response to a stimulus.
Reflexes are found with varying levels of complexity in organisms with a nervous system. A reflex occurs ...
, neural reaction
*
Hypersensitivity
Hypersensitivity (also called hypersensitivity reaction or intolerance) refers to undesirable reactions produced by the normal immune system, including allergies and autoimmunity. They are usually referred to as an over-reaction of the immune s ...
, immune reaction
*
Intolerance (disambiguation)
Intolerance may refer to:
* Hypersensitivity or intolerance, undesirable reactions produced by the immune system
* Intolerance (film), ''Intolerance'' (film), a 1916 film by D. W. Griffith
* Intolerance (album), ''Intolerance'' (album), the first ...
*
Light reaction (disambiguation) Light reaction may refer to:
* Light-dependent reactions
* Pupillary light reflex
The pupillary light reflex (PLR) or photopupillary reflex is a reflex that controls the diameter of the pupil, in response to the intensity (luminance) of light tha ...
.
Psychology
*
Emotion
Emotions are mental states brought on by neurophysiological changes, variously associated with thoughts, feelings, behavioral responses, and a degree of pleasure or displeasure. There is currently no scientific consensus on a definition. ...
al, reaction
*
Reactivity (behaviour)
*
Proactivity
Proactivity or proactive behavior refers to self-initiated behavior that endeavours to solve a problem before it has occurred. Proactive behavior involves acting in advance of a future situation, rather than reacting. It refers to taking control o ...
, opposite of reactive behaviour
*
Reactive attachment disorder.
Politics and culture
*
Reactionary
In political science, a reactionary or a reactionist is a person who holds political views that favor a return to the ''status quo ante'', the previous political state of society, which that person believes possessed positive characteristics abse ...
, a political tendency
*
Reaction video
A reaction video is a video in which people react to something. Videos showing the emotional reactions of people viewing television series episodes, film trailers and music videos are also numerous and popular on video hosting services such as You ...
*
Commentary (disambiguation)
Commentary or commentaries may refer to:
Publications
* ''Commentary'' (magazine), a U.S. public affairs journal, founded in 1945 and formerly published by the American Jewish Committee
* Caesar's Commentaries (disambiguation), a number of works ...
.
Proper names and titles
*
''Reaction'' (album), a 1986 album by American R&B singer Rebbie Jackson
**
"Reaction" (song), the title song from the Rebbie Jackson album
*"Reaction", a single by
Dead Letter Circus
*
ReAction GUI, a GUI toolkit used on AmigaOS
*
Reaction.life
Reaction.life is a British news website that features reporting and analysis on politics, economics, culture and ideas.
Reaction is based in London and edited by former ''Scotsman'', ''Telegraph'' and ''Wall Street Journal'' executive Iain Mart ...
, a political news and commentary website edited by Iain Martin
*
Reaction Records
Reaction Records was an independent British record label, run by music executive Robert Stigwood in 1966 and 1967. Although Reaction released only three albums, one EP and eighteen singles in its brief existence, its roster included two of the ...
, a record label
*''
TNA Reaction'', a former documentary show of TNA Wrestling (now known as Impact Wrestling) behind the scenes
*
Reaction (''The Spectacular Spider-Man''), an episode of the American animated television series ''The Spectacular Spider-Man''
*''
The Reaction'', a novel in the ''Animorphs'' series
*''
''Reactions'' (journal), a chemistry journal published by MDPI
See also
*
Action (disambiguation)
*
Stimulus (disambiguation)
{{Disambiguation