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...

squirrel
Animal Water Regulation

Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..

Genetics and Evolution
Genetics and Evolution

Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..

Stem
Stems

Stems primarily provide plants structural support. This tutorial includes lectures on the external form of a woody twig ..

Direct and indirect physiologic effects of growth hormone
Animal Growth Hormones

Hormones are produced in the endocrine glands of animals. The pituitary gland and hypothalamus are the most impor..

Peppered moth ("Biston betularia") melanic and light form
Examples of Natural Selection

Darwin's Finches are an example of natural selection in action. They are an excellent example of the way species' gene p..

Cambial cells
Plant Tissues

Plant organs are comprised of tissues working together for a common function. The different types of plant tissues are m..

Related Articles...

No related articles found

See all Related Topics