(n.) A segmental tubule; one of the tubules of the primitive urinogenital organs; a segmental organ. See Illust. under Loeven's larva.
Example Sentences:
(1) The nephridial nerve cells of the leech, Hirudo medicinalis, 34 sensory cells, each associated with one nephridium, are sensitive to changes in extracellular Cl- concentration, an important factor in ion homeostasis.
(2) However, in segments which normally do not contain the mesodermal portion of the nephridium, the distal tubule cell dies before undergoing its terminal morphological differentiation.
Tubular
Definition:
(a.) Having the form of a tube, or pipe; consisting of a pipe; fistular; as, a tubular snout; a tubular calyx. Also, containing, or provided with, tubes.
Example Sentences:
(1) It is concluded that during exposure to simulated microgravity early signs of osteoporosis occur in the tibial spongiosa and that changes in the spongy matter of tubular bones and vertebrae are similar and systemic.
(2) Measurement of urinary GGT levels represents a means by which proximal tubular disease in equidae could be diagnosed in its developmental stages.
(3) We studied 15 renal transplant recipients for evidence of tubular dysfunction.
(4) The role of adrenergic agents in augmenting proximal tubular salt and water flux, was studied in a preparation of freshly isolated rabbit renal proximal tubular cells in suspension.
(5) Diminished CMD was most common with AR (7 of 12) but was also seen with acute tubular necrosis (2 of 6) and cyclosporin toxicity (2 of 3).
(6) Histopathological studies confirmed that mice fed 933cu-rev died from bilateral renal cortical tubular necrosis consistent with toxic insult, perhaps due to Shiga-like toxins.
(7) Our study suggests that a major part of the renal antimineralocorticoid activity of spironolactone may be attributable to minor sulfur-containing metabolites or their precursors having a high renal clearance that affords access to their site of activity via the renal tubular fluid.
(8) Mitochondria with tubular christae are described for the first time in such a tumour.
(9) In this study, we examined renal tubular cell handling of digoxin and ouabain using LLC-PK1 cells, a model of proximal renal tubular cells.
(10) The present results suggest that TMB-8 blocks twitches by preventing the release of Ca++ ions bound to the intracellular surface of the t-tubular membrane which is often called the store of 'trigger-calcium' ions.
(11) Tubular and colloid carcinomas were more likely to present with T1 lesions, hormone receptor positivity, and node negative status than the other histologic subtypes.
(12) Persistence of hypercalcaemia combined with an increase in tubular reabsorption of calcium in response to cellulose phosphate may be of diagnostic value in suspected primary hyperparathyroidism.
(13) Furthermore, 75% of cases of intestinal metaplasia in gastric mucosa and 30% of tubular adenomas, 50% of villous adenomas and 70% of tubulovillous adenomas in the colon co-expressed Lea and Leb antigens.
(14) This also implies that both tubular secretion and tubular reabsorption are susceptible to competition between similar substrates for a common carrier site.
(15) The blockage of the tubular system by the calcium oxalate deposits leads to a temporary reversible increase in serum urea and serum creatinine.
(16) After 35 and 43 days, spermatogenesis was complete in 99.6% of the tubular cross sections, and most tubular cross sections were in stages IV-VII of the cycle of the seminiferous epithelium.
(17) Serial sections from over a hundred such structures show that these are tubular structures and that the 'test-tube and ring-shaped' forms described in the literature are no more than profiles one expects to see when a tubular structure is sectioned.
(18) Experimental data were analysed by a 2-compartment nonlinear model that describes both tubular secretion and cellular uptake in Michaelis-Menten terms.
(19) The findings support the assumption that changes in tubular Na+ transport probably participate in the changes of tubular amino acid transport in elderly individuals.
(20) At 4 degrees C or after fixation, anti-renal tubular brush border vesicle (BBV) IgG bound diffusely to the surface of GEC and to coated pits.