mechanical

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me·chan·i·cal

(mĕ-kan'i-kăl),
1. Performed by means of some apparatus, not manually.
2. Explaining phenomena in terms of mechanics.
3. Automatic.
[G. mechanikos, relating to a machine, fr. mēchanē, a contrivance, machine]

mechanical

adjective Referring to or performed by a machine.

me·chan·i·cal

(mĕ-kan'i-kăl)
1. Performed by means of some apparatus, not manually.
2. Explaining phenomena in terms of mechanics.
3. Automatic.
[G. mēchanikos, relating to a machine, fr. mēchanē, a contrivance, machine]

Patient discussion about mechanical

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.

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References in periodicals archive ?
Jess made what he called "Translations," "Salvages," or "Paste-Ups": paintings based on photographs or overpaintings of other paintings, often with such heavy applications of paint that the images stuck out of the frames like impasto elves, and the kind of collages Raoul Hausmann or Hannah Hoch might have made if they'd lived in San Francisco in the '50s.
Ironically, he called these densely packed constellations of printed matter, which he started making in 1951, simply "Paste-Ups," referring to the childhood activity of making worlds by cutting and pasting at the kitchen table.
The resulting paste-ups prove that Kelly is one of the great "visualists" (his word) of our time.
When he wasn't executing paste-ups and mechanicals for an ad agency in New York, he'd rouse himself midday to scavenge paper at a waste disposal plant for printers in nearby Newark.