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Tag Archives: Glossary

Eye Flashes: definition

phenomena that can originate in the eye when the vitreous gel pulls on or separates from the retina such as during or after a posterior vitreous detachment or from the visual centers of the brain such as what sometimes occurs ...

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Eye Floaters: definition

Small clumps of cells or tissue that “float” in the clear gel of the vitreous body, the large chamber of the eyeball behind the lens and before the retina.  Light travels through the clear lens and vitreous gel to focus ...

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Natural Killer Cells: definition

A unique immune cell type able to kill cancer and virus-infected cells. The nature of the killer receptors expressed on natural killer cells (NK cells), mediating this killing, and their ligands, is only little understood. Four lysis receptors for human ...

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Toxin: definition

technical term: a poisonous substance of plant or animal origin1 such as poisons produced by microcsopic bacteria, molds, and viruses and venoms from animal bites and stings. non-technical term: environmental pollutants such as synthetic additives to food, heavy metals, drugs, chemicals, and ...

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Celiac Disease, Genetic Susceptibility: definition

An inherited disease in which much of the genetic susceptibility maps to the HLA region on chromosome 6, as approximately 95% of celiac disease patients carry an almost identical HLA DQ2 heterodimer (DQA1*0501 DQB1*0201). In most individuals who are negative ...

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Celiac Disease, Immuno-Pathogenesis: definition

The inherited immune sensitivity to ingested gluten in celiac disease is caused by activation of effector CD4+ T cells (T-helper cells) in the lamina propria (tissues underlying the mucosal surface) by peptides derived from gluten protein in wheat, rye, barley and, for some ...

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Microvilli, Intestinal: definition

Minute structures densely covering and projecting from the surface membrane (called brush border) of intestinal epithelial cells that form villi  for the purpose of absorbing nutrients and producing enzymes which finish digestion of carbohydrates including lactose, sucrose, and maltose and ...

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Brush Border (Intestinal Microvilli): definition

Surface membrane of intestinal epithelial cells that compose villi where absorption of nutrients takes place by densely packed microvilli that form the brush border and which prevents physical contact between undigested food and bacteria within the small intestine and body ...

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Celiac Disease: definition

An inherited immune reaction to gluten, a protein found in wheat, rye, barley, and to a lesser toxicity, oats that damages the lining of the small intestine, causes leaky gut, interferes with the proper absorption of nutrients, and has the ...

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Pathogenic Organism: definition

Disease producing organism, so that infection results if the organism invades the body.

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Filamentous: definition

Thread-like structure.  

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Fat: definition

The most concentrated stored energy in food. Each gram (g) supplies 9 calories of energy. Fats are digested to fatty acid and glycerol molecules and serve as a carrier to absorb the fat-soluble vitamins A, D, E, and K into ...

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Cancer Predisposition In Children 

What Is Cancer Predisposition In Children? Cancer predisposition in children signifies a higher than normal risk of developing cancer. Cancer is the uncontrolled division of abnormal cells in the body. Among the 12 major types of childhood cancers, leukemias (blood ...

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Psoriasis

 What Is Psoriasis? Psoriasis is a chronic, autommune relapsing skin disorder characterized by scaling, erythema (redness), and less commonly, pustulation.1  The body surface area affected and the degree to which psoriasis is a problem varies considerably among patients and over time.2 Often ...

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Chief Complaint: definition

The reason given by the patient for visiting a health professional.

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