mechanism

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mechanism

 [mek´ah-nizm]
1. a machine or machinelike structure.
2. the manner of combination of parts, processes, or other aspects that carry out a common function.
3. the theory that the phenomena of life are based on the same physical and chemical laws that govern inorganic matter, as opposed to vitalism.
coping m's conscious or unconscious strategies or mechanisms that a person uses to cope with stress or anxiety including turning to a comforting person for love and support, self-discipline, acting out or working off tension, talking and expressing feelings by crying or laughing, and also unconscious defense mechanisms, such as avoidance and rationalization.
defense mechanism see defense mechanism.

mech·a·nism

(mek'ă-nizm),
1. An arrangement or grouping of the parts of anything that has a definite action.
2. The means by which an effect is obtained.
3. The chain of events in a particular process.
4. The detailed description of a reaction pathway.
[G. mēchanē, a contrivance]

mechanism

Medspeak
The manner by which a process occurs; the arrangement or association of the elements or parts of a thing in relation to the effect generated.

Psychology
The combination of mental processes by which an effect is generated.

mechanism

Medtalk The manner by which a process occurs; the arrangement or association of the elements or parts of a thing in relation to the effect generated

mech·a·nism

(mek'ă-nizm)
1. An arrangement or grouping of the parts of anything that has a definite action.
2. The means by which an effect is obtained.
3. The chain of events in a particular process.
4. The detailed description of a reaction pathway.
5. biowarfare A device or part of one intended to release a biologic or chemical agent.
[G. mēchanē, a contrivance]

mech·a·nism

(mek'ă-nizm)
1. Arrangement or grouping of parts of anything that has a definite action.
2. Means by which an effect is obtained.
3. Chain of events in a particular process.
[G. mēchanē, a contrivance]

Patient discussion about mechanism

Q. How does an allergic response occur? I don’t understand the exact mechanism of allergies. Can someone explain this?

A. In the early stages of allergy, a type I hypersensitivity reaction against an allergen, encountered for the first time, causes a response in a type of immune cell called a TH2 lymphocyte, that interact with other lymphocytes called B cells, whose role is production of antibodies. The secreted IgE antibody circulates in the blood and binds to an IgE-specific receptor (a kind of Fc receptor called FceRI) on the surface of other kinds of immune cells called mast cells and basophils, which are both involved in the acute inflammatory response. The IgE-coated cells, at this stage are sensitized to the allergen. If later exposure to the same allergen occurs, the allergen can bind to the IgE molecules held on the surface of the mast cells or basophils and cause a full reaction.

More discussions about mechanism
References in periodicals archive ?
It is likely that field resistance results from a combination of physiological resistance and escape mechanisms: Early maturity and an upright, open canopy are correlated with reduced levels of disease and are likely escape mechanisms (Nelson et al., 1991; Boland and Hall, 1987).
Electronic and Physical Security Services and Equipment: Includes security engineering, technical security, counter-terrorism, audio countermeasures, personal protective equipment, firearms and ammunition, safety and escape mechanisms, special first-aid kits, etc.
The need for a specific training curriculum was explored and it was felt that the critical skill areas that should be the focus of such training are planning and avoidance skills, evasive strategies and escape mechanisms. Worker safety training is an area that needs to be conducted on an annual basis, and this plan to train staff should involve annual refresher training.
Dr Molly Scott Cato, of Cardiff Business School, has totted up the cost of a range of 'escape mechanisms', including alcohol abuse, illegal drugs, depression, gambling and smoking.
Their efforts to exit the pot of boiling water represent mere "escape mechanisms, not a conscious response or indication of pain," according researchers from the University of Oslo.
The hearings demonstrated that Soviet exploitation of those movements included military and political training in the Soviet Union and its proxy states; furnishing equipment, including special weapons, money, documents, and escape mechanisms; furnishing advisers, some of whom participated in the selection of civilian targets; and furnishing propaganda support directly in the Soviet and satellite press as well as through stories planted in the international press.
Other working and middle-class parents today may be seen as striving to silence doubts about their sacrifices and the escape mechanisms they employ by demonizing youth culture.
sclerotiorum has been difficult because of the interaction of escape mechanisms and physiological resistance.
Vaccines that are designed to boost specific immunity against breast cancer will probably work best in early-stage disease, in which the postsurgical tumor burden is relatively low, the cancer cells have not yet evolved sophisticated escape mechanisms, and the patient has not been saddled with severe immunoincompetence due to extensive chemotherapy said Dr.
In lay terms we should think of discriminative stimuli as danger signals and discriminative responses as escape mechanisms.
And there were ways in which the Ottoman may be considered fairly unique: the provincial system, governed by officials with short terms of office; the provision of peasants with escape mechanisms other than revolt; and otherwise the avoidance of both peasant and elite solidarity.