(n.) The quality or state of being spontaneous, or acting from native feeling, proneness, or temperament, without constraint or external force.
(n.) The tendency to undergo change, characteristic of both animal and vegetable organisms, and not restrained or cheked by the environment.
(n.) The tendency to activity of muscular tissue, including the voluntary muscles, when in a state of healthful vigor and refreshment.
Example Sentences:
(1) Spectral analysis of spontaneous heart rate fluctuations, a powerful noninvasive tool for quantifying autonomic nervous system activity, was assessed in Xenopus Laevis, intact or spinalized, at different temperatures and by use of pharmacological tools.
(2) Hypothyroidism complicated by spontaneous hyperthyroidism is an interesting but rare occurrence in the spectrum of autoimmune thyroid disorders.
(3) Spontaneous locomotor activity was lower in naloxone-infused rats on day 3 only.
(4) administration of the potent short-acting opioid, fentanyl, elicited inhibition of rhythmic spontaneous reflex increases in vesical pressure (VP) evoked by urinary bladder distension.
(5) Sample processing appears effective in avoiding spontaneous oxalogenesis.
(6) Thus, B cells that grow spontaneously from the peripheral blood of SS patients spontaneously produce a B-cell growth factor.
(7) They can rarely be detected spontaneously but most often are provoked.
(8) The ACTH deficiency recovered spontaneously, with normal cortisol responses to depot Synacthen (greater than 1380 at 6 h) and hypoglycemia (peak, 590) 14 and 18 months postpartum, respectively.
(9) The number of peripheral blood lymphocytes (PBL) producing IgM (spontaneous and pokeweed mitogen (PWM) stimulated) at the end of a seven day culture period was similar in PBC patients and control subjects while the amount of IgM synthesized (spontaneous and PWM stimulated) during this period was significantly greater in the patient group, implying that the amount of IgM produced per B cell was increased in PBC.
(10) In in vitro preparations GABA (10(-7) - 10(-3) M) elicited a dose-dependent relaxation; a decrease in the spontaneous contractions was sometimes observed.
(11) Fractures which occur near the base of the dens have a low propensity to unite spontaneously.
(12) The cell fermentation culture with a stabilized pH value was better than the culture with the pH value changing spontaneously on saponin content, growth rate and biomass.
(13) Recovery was spontaneous and no antimicrobial agents were required.
(14) Over a period of 9 months a 12-year-old girl spontaneously developed a palpable cystic tumor in the upper eye lid which led to an indentation and downward displacement of the globe.
(15) In the dark the 6-azidoflavoproteins are quite stable, except for L-lactate oxidase, where spontaneous conversion to the 6-amino-FMN enzyme occurs slowly at pH 7.
(16) Spontaneous reports of suspected adverse reactions may be the only way of revealing very rare events but they present great difficulties of rational interpretation.
(17) In addition, spontaneous platelet aggregation is increased when vegetations are present on cardiac valves.
(18) Media made hyperosmotic with sucrose increase the frequency of spontaneously released quanta of transmitter, or miniature excitatory postsynaptic potentials (MEPSPs).
(19) There is no convincing evidence that immunosuppression is effective, also because the natural history of the disease is characterised by a spontaneous disappearance of the factor VIII-C inhibitor.
(20) By contrast, the concentrations of IgA1 kappa and IgA1 lambda in PBMC culture supernatants, both spontaneous and PWM-stimulated, were identical in patients and controls.
Undergo
Definition:
(v. t.) To go or move below or under.
(v. t.) To be subjected to; to bear up against; to pass through; to endure; to suffer; to sustain; as, to undergo toil and fatigue; to undergo pain, grief, or anxiety; to undergothe operation of amputation; food in the stomach undergoes the process of digestion.
(v. t.) To be the bearer of; to possess.
(v. t.) To undertake; to engage in; to hazard.
(v. t.) To be subject or amenable to; to underlie.
Example Sentences:
(1) Thirty-two patients (10 male, 22 female; age 37-82 years) undergoing maintenance haemodialysis or haemofiltration were studied by means of Holter device capable of simultaneously analysing rhythm and ST-changes in three leads.
(2) In 49 cases undergoing systemic lymphadenectomy 32 were found to have glandular involvement, of which both aortic and pelvic nodes were positive in 17 cases (53.1%), aortic nodes positive but pelvic negative in six (18.8%), and pelvic nodes positive but aortic negative in nine (28.1%).
(3) Squadron Leader Kevin Harris, commander of the Merlins at Camp Bastion, the main British base in Helmand, praised the crews, adding: "The Merlins will undergo an extensive programme of maintenance and cleaning before being packed up, ensuring they return to the UK in good order."
(4) The diffusion of Myocamicin in the prostatic tissue of patients undergoing prostatectomy after a single oral dose of 600 mg has been studied.
(5) During capillary growth when endothelial cells (EC) undergo extensive proliferation and migration and pericytes are scarce, hyaluronic acid (HA) levels are elevated.
(6) Peripheral blood monocytes undergo an oxidative burst similar to that seen in neutrophils.
(7) An experimental model was established in the ewe allowing one to predict with accuracy an antral follicle that coincidentally would either undergo ovulation (6-8 mm diameter) or atresia (3-4 mm diameter) following synchronization of luteal regression and the onset of the gonadotropin surge.
(8) The relative contributions of transcriptional and posttranscriptional regulation of gene expression to the increase in constitutively expressed cellular proteins were examined in mouse kidneys undergoing compensatory growth following unilateral nephrectomy (UNI-NX).
(9) The DDE also undergoes photocyclization to give dichlorofluorene derivatives.
(10) This study demonstrated that significant global and regional ventricular dysfunction develops immediately after removal of the papillary muscles, whereas myocardial contractility is preserved in patients undergoing mitral valve repair.
(11) All 80 adult cardiac surgery patients undergoing a cardiac operation at one institution during the final quarter of 1983 were included in this prospective study.
(12) Cholecystectomy provided successful treatment in three of the four patients but the fourth was too ill to undergo an operation; in general, definitive treatment is cholecystectomy, together with excision of the fistulous tract if this takes a direct path through the abdominal wall from the gallbladder, or curettage if the course is devious.
(13) Between January 1979 and April 1983, 113 children undergoing their first relapse of acute lymphoid leukemia (ALL) at any site were registered in Pediatric Oncology Group study 7834; 98 were eligible and evaluable.
(14) Electromagnetic interference presented as inhibition and resetting of the demand circuitry of a ventricular-inhibited temporary external pacemaker in a 70-year-old man undergoing surgical implantation of a permanent bipolar pacemaker generator and lead.
(15) This implies that these proteins are quantitatively absorbed from the peritoneum without undergoing modifications.
(16) Five normovolemic patients undergoing cardiac catheterization for atypical chest pain syndrome volunteered for this study.
(17) The cardiorespiratory effects of trichloroethylene supplementation of nitrous oxide-oxygen anesthesia, with simultaneous use of halothane at induction as needed, were studied in outpatient oral surgery patients undergoing dental extractions under general anesthesia.
(18) Persons with clinical abdominal findings, shock, altered sensorium, and severe chest injuries after blunt trauma should undergo the procedure.
(19) Forty five elderly patients undergoing total hip replacements were assessed one day before and two days after surgery in order to explore the relationship between pre-operative anxiety and post-operative delirium.
(20) In 29 patients undergoing duplex sonography of the hepatic artery, six (21%) had absence of a Doppler arterial pulse.