Dictionary > Triple response

Triple response

Definition
noun
(immunology) The three cardinal circulatory responses of the skin (i.e. reddening, flare formation or flushing of adjacent skin, and wheal formation or swelling) to any form of injury, such as pricks, scratches, burns, exposure to corrosive chemical agents, and so on.
(botany) The three characteristic morphologic changes on an etiolated seedling in response to the presence of ethylene. These morphologic changes include inhibited root elongation, enhanced radial swelling and shortening of hypocotyl, and exaggerated curved apical hook.
Supplement
In immunology, the three typical reactions of the skin to injury includes: (1) formation of erythema or red spots caused by capillary dilation from endogenous histamine like molecules released at the site of injury, (2) flare formation or expanding of reddening on adjacent skin caused by neighboring arteriolar dilatation, and (3) formation of wheals caused by increased vascular permeability and fluid accumulating at the site of injury.
In botany, the triple response is used in a bioassay to determine the presence of ethylene.
Synonym:

  • Lewis Triple Response (immunology)


You will also like...

dinosaurs
The Dinosaurs

Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presu..

Wart-like leaf galls on grape leaves
Plant Cell Defense

Plants protect themselves by releasing hydrogen peroxide to fight against fungal invasion. Another way is by secreting c..

New Zealand Flora & Fauna
Ecology & Biodiversity: New Zealand Flora & Fauna

New Zealand is known for its unique biodiversity, caused by its remarkable geography and geologic history. Breaking away..

human brain structure
The Conscious & Unconscious Nervous System

This tutorial elaborates on how the nervous system works, particularly at the tissue level of the brain. There are three..

Birth Control and Contraception
Birth Control and Contraception

Different pregnancy and birth control and contraception strategies are described. Read this tutorial to learn each of th..

river
Running Water Freshwater Communities

This tutorial introduces flowing water communities, which bring new and dithering factors into the equation for possible..

Related Articles...

No related articles found

See all Related Topics