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 ?
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.
Henceforth the paste-ups will be so densely layered with images that they convey the kind of wonder found in Victorian fairy paintings like Richard Dadd's--a wonder based on abundance and meticulousness, as though the artist performs a slow task in a fairy tale, say, counting grains of sand: