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

/mech·a·nism/ (mek´ah-nizm)
1. a machine or machine-like structure.
2. the manner of combination of parts, processes, etc., which subserve a common function.

defense mechanism  a usually unconscious mental mechanism by which psychic tension is diminished, e.g., repression, rationalization, etc.
escape mechanism  in the heart, the mechanism of impulse initiation by lower centers in response to lack of impulse propagation by the sinoatrial node.
mental mechanism 
1. the organization of mental operations.
2. an unconscious and indirect manner of gratifying a repressed desire.

mechanism

[mek′əniz′əm]
1 an instrument or process by which something is done, results, or comes into being.
2 a machine or machinelike system.
3 a stimulus-response system.
4 a habit or drive.

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]

mechanism,

n the path whereby a treatment works.

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]

mechanism,

n a structure of working parts functioning together to produce an effect.
mechanism, cough,
n a short inspiration, closure of the glottis, forcible expiratory effort, and then release of the glottis, with a rush of air at a flow rate of 3000 to 4000 cc/sec. It is essentially used or regarded as a process for removing foreign material from the lungs. It involves two phases. In the first, the combined action of the cilia and bronchiolar peristalsis moves the material up to the main bronchi and the bifurcation of the trachea. Further movement out of the respiratory system depends on the cough mechanism. In all medical conditions in which this mechanism is abolished or reduced, secretions and foreign material accumulate in the alveoli, with a resultant reduction in the aerating surface and a predisposition to infection. Because ventilation of the lungs depends on a patent airway, the cough mechanism should always be used by patients whose inadequate ventilation of lungs may be related to obstruction of the airway.
mechanism, inhibitory-excitatory
(inhib´itor´ē-eksī´tətor´ē),
n a mechanism that provides coordinated and continuous stimuli to the lower motor neuron for smooth, facile, and rapidly adjustable muscle contraction. This mechanism operates on every level of the central nervous system, from the final common pathway back up the spinal cord to the cerebrum. The excitatory phase of stimulation is transmitted directly to the nerve. Inhibition, however, is effected not by stimulating the motor output directly, as is done in the parasympathetic nerves, but rather by the interaction of inhibitory mechanisms on the excitatory impulses.
mechanism, respiratory control,
n the mechanism by which the respiratory functions are controlled. Three major factors in the control of respiration concern the clinician: neurogenic control of respiration, chemical regulation of respiration, and mechanical events leading to pulmonary ventilation. These three factors are significant in practice procedures because the clinician influences each of these factors in routine dental care; e.g., the patency of the airways is always subject to alteration by instrumentation, dental prostheses, and the use of pharmacologic agents, and the physically induced responses modify the rate and magnitude of the respiratory mechanism.
mechanism, self-cleansing,
n any of the structures within the oral cavity (e.g., teeth, saliva, oral mucosa, and tongue) that naturally allow the removal of substances entering the oral cavity that may affect the cleanliness of the cavity and promote the production of deposits.
mechanism, suspensory,
n the hammocklike arrangement of the structures comprising the attachment apparatus.

mechanism

1. a machine or machine-like structure.
2. the manner of combination of parts, processes, etc., which subserve a common function.

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 ?
Unfortunately, analyses of case studies of swindles reveal few danger signals and escape mechanisms.
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.
Address the growing challenge of drug-resistance and therapy escape mechanisms used by pathogens
Additionally, the anti-angiogenic activity of GEN-1 mediated through up regulation of the interferon gamma (IFN-gamma) pathway may help to explain the remarkable synergy between GEN-1 and Avastin and potentially addresses the VEGF escape mechanisms associated with resistance to Avastin therapy.
We believe that the combination of therapies targeting different tumour escape mechanisms is about to change the way we treat a complex disease such as cancer.
The killing of cancer cells by GBR 1302 is more rapid, more complete and not subject to the same resistance escape mechanisms as competing therapies.
The bills the Democrats crafted were so fraught with liberal loopholes and escape mechanisms they were worthy of a Houdini virtuoso performance.
As we develop the ability to block, with precision, the drivers of tumor growth, we must also block the escape mechanisms facilely used by these cells," Neil said.
Additionally, the anti-angiogenic activity of GEN-1 mediated through up regulation of the interferon gamma (IFN-g) pathway may help to explain the remarkable synergy between GEN-1 and Avastin and potentially addresses the VEGF escape mechanisms associated with resistance to Avastin therapy.