| oligodendroglia cells | See: oligodendroglia. (05 Mar 2000) |
|---|---|
| oxyphil cells | Cell's of the parathyroid gland that increase in number with age; the cytoplasm contains numerous mitochondria and stains with eosin. Similar cell's, and tumours composed of them, are found in salivary glands and the thyroid; in the latter, also called Hurthle cell's. (05 Mar 2000) |
| tanned red cells | Erythrocytes subjected to mild treatment with chemicals such as tannic acid so that they adsorb onto their surface soluble antigens; used in haemagglutination tests. (05 Mar 2000) |
| taste cells | Darkly staining cell's in a taste bud that appear to have extending into the gustatory pore long hair-like microvilli containing a number of closely packed microtubules; the taste cell's stand in synaptic contact with sensory nerve fibres of the facial, glossopharyngeal, or vagus nerves. Synonym: gustatory cells. (05 Mar 2000) |
| T cytotoxic cells | Lymphocyte-like effector cells which mediate antibody-dependent cell cytotoxicity. They kill antibody-coated target cells which they bind with their fc receptors. (12 Dec 1998) |
| TDTH cells | A functional subset of T helper cells that are involved in delayed-type hypersensitivity reactions. (05 Mar 2000) |
| tendon cells | Elongated fibroblastic cell's arranged in rows between the collagenous tendon fibres. (05 Mar 2000) |
| Tg cells | A subset of T-cells that have an Fc receptor for immunoglobulin G molecules. (05 Mar 2000) |
| th1 cells | Subset of helper-inducer T-lymphocytes which synthesise and secrete interleukin-2, gamma-interferon, and interleukin-12. Due to their ability to kill antigen-presenting cells and their lymphokine-mediated effector activity, th1 cells are associated with vigorous delayed-type hypersensitivity reactions. (12 Dec 1998) |
| th2 cells | Subset of helper-inducer T-lymphocytes which synthesise and secrete the interleukins il-4, il-5, il-6, and il-10. These cytokines influence B-cell development and antibody production as well as augmenting humoral responses. (12 Dec 1998) |
| theca cells | The connective tissue cells of the graafian follicle. (12 Dec 1998) |
| theca cells of stomach | Cell's lining the gastric surface and foveolae; a glycoprotein product at the apical end of each cell is secreted and forms a mucous protective film. Synonym: theca cells of stomach. (05 Mar 2000) |
| T helper cells | A subset of lymphocytes that secrete various cytokines that regulate the immune response. (05 Mar 2000) |
| Tm cells | T helper cells that have an Fc receptor for immunoglobulin M molecules. (05 Mar 2000) |
| endocrine cells of gut | Cells found throughout the lining of the gastrointestinal tract that contain regulatory peptide hormones and/or biogenic amines. The substances are located in secretory granules and act in an endocrine or paracrine manner. Some of these substances are also found in neurons in the gut. There are at least 15 different types of endocrine cells of the gut. Some take up amine precursors and have been called apud cells. However, most endocrine cells of the gut apparently have endodermal rather than neuroectodermal origin, so the relationship with apud cells is not clear. (12 Dec 1998) |