| PCT | peripheral carcinoid tumor; plasma clotting time; plasmacrit test; plasmacytoma; polychlorinated tri... |
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| PST | pancreatic suppression test; paroxysmal supraventricular tachycardia; penicillin, streptomycin, and ... |
| TSCT | Thin Section Computed Tomography = HRCT |
| ITLC | instant thin-layer chromatography |
| MOTSA | multiple overlapping thin slab acquisition [technique] |
| convoluted seminiferous tubule | One of two or three twisted curved tubules in each lobule of the testis, in which spermatogenesis occurs. Synonym: tubulus seminifer contortus, tubulus contortus. (05 Mar 2000) |
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| convoluted tubule of kidney | The highly convoluted segments of the nephron in the renal labyrinth comprising the proximal convoluted tubule, which leads from Bowman's capsule to the descending limb of Henle's loop, and the distal convoluted tubule, which leads from the ascending limb of Henle's loop to the collecting tube. Synonym: tubulus renalis contortus, Ferrein's tube, tubulus contortus. (05 Mar 2000) |
| pronephric tubule | An excretory unit of the pronephros, present only in vestigial form in human embryos. (05 Mar 2000) |
| segmental tubule | An excretory tubule of the mesonephros. Synonym: segmental tubule. (05 Mar 2000) |
| seminiferous tubule | <anatomy> In the testicles, the network of tubes where sperm cells are formed. (09 Oct 1997) |
| seminiferous tubule dysgenesis | A disorder in which the seminiferous tubules exhibit an abnormal cytoarchitecture and extensive hyalinization; the testes are small, and few spermatozoa are formed; the body habitus may be eunuchoid, and gynaecomastia may be present; urinary gonadotropin output is usually high, and the incidence of mental deficiency and illness increased; sex chromatin may be male or female, and androgen secretion ranges from subnormal to normal. It is a constant feature of (and is often used synonymously with) Klinefelter's syndrome. Synonym: germinal aplasia. (05 Mar 2000) |
| spiral tubule | The segment of urinary tubule coming next after the proximal convoluted tubule. (05 Mar 2000) |
| straight seminiferous tubule | The continuation of the tubulus seminifer contortus which becomes straight just before entering the mediastinum to form the rete testis. Synonym: tubulus renalis rectus, tubulus seminifer rectus, collecting tubule, straight tubule, tubulus rectus, tubulus rectus, vasa recta. (05 Mar 2000) |
| straight tubule | One of the straight tubules of the kidney, present in the medulla and pars radiata of the cortex. Synonym: straight seminiferous tubule. (05 Mar 2000) |
| discharging tubule | A urinary tubule formed by the union of several collecting tubule's and terminating as a papillary duct. (05 Mar 2000) |
| transverse tubule | <cell biology> Invagination of the plasma membrane (sarcolemma) of striated muscle that lies between two tubular portions of the endoplasmic (sarcoplasmic) reticulum to form a triad of membrane profiles adjacent to the A band/I band junction in some cases, in other cases to the Z disc, of the resting sarcomere. Depolarisation of the T tubule membrane triggers the release of calcium from the sarcoplasmic reticulum and eventually muscle contraction. (18 Nov 1997) |
| T tubule | <cell biology> Invagination of the plasma membrane (sarcolemma) of striated muscle that lies between two tubular portions of the endoplasmic (sarcoplasmic) reticulum to form a triad of membrane profiles adjacent to the A band/I band junction in some cases, in other cases to the Z disc, of the resting sarcomere. Depolarisation of the T tubule membrane triggers the release of calcium from the sarcoplasmic reticulum and eventually muscle contraction. (18 Nov 1997) |
| tubule | 1. A small pipe or fistular body; a little tube. 2. <anatomy> A minute tube lined with glandular epithelium; as, the uriniferous tubules of the kidney. Origin: F. Tubule, or L. Tubulus, dim. Of tubus a tube, a pipe. Source: Websters Dictionary (01 Mar 1998) |
| uriniferous tubule | The functional unit of the kidney, composed of a long convoluted portion (nephron) and an intrarenal collecting duct. (05 Mar 2000) |