Reaction
Reaction
Reaction (pronunciation: /riˈakSH(ə)n/) is a term used in various fields of medicine to describe the response of an organism to a stimulus. The term is derived from the Latin word 'reactio', meaning 'a response'.
Etymology
The term 'reaction' comes from the Latin 'reactio', which is derived from the verb 'reagere'. 'Re' means 'back' or 'again', and 'agere' means 'to do' or 'to act'. Therefore, 'reactio' essentially means 'to act again' or 'to respond'.
In Medicine
In medicine, a reaction can refer to several different concepts:
- Adverse reaction: An unexpected or harmful response to a medication or treatment.
- Allergic reaction: A hypersensitive response of the immune system to a substance that is typically harmless.
- Reaction time: The time it takes for a person to respond to a stimulus.
Related Terms
- Response: A general term for the body's reaction to a stimulus.
- Stimulus: Anything that can trigger a physical or behavioral change.
- Immune response: The reaction of the immune system to a foreign substance.
- Inflammatory reaction: The body's response to injury or infection, characterized by redness, heat, swelling, and pain.
See Also
External links
- Medical encyclopedia article on Reaction
- Wikipedia's article - Reaction
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