(1) It is probably that tolazoline also releases acetylcholine from the guinea pig atria.
(2) Exposure of rabbit atria to theophylline, 2.5 X 10(-4) M, did not potentiate the inotropic effects of tolbutamide.
(3) At higher concentrations of burimamide, inhibition curves showed distinct evidence of departure from competitive character for both guinea pig and rabbit atria.
(4) At a concentration of 10 microM, tetraamine 4 did not affect histamine and 5-hydroxytryptamine receptors of guinea pig ileum or alpha-adrenoreceptors of guinea pig atria whereas it inhibited postsynaptic alpha-adrenoreceptors of rat vas deferens with a -log K value of 5.23 and nicotinic receptors of frog rectus abdominis with an IC50 value of 0.23 microM.
(5) Isoprenaline produced positive chronotropic responses in right atria and positive inotropic responses in left atria and ventricular strips.
(6) In both the atria and the ventricles of adult SHR, [125I]351A binding was very significantly reduced.
(7) The heart atria represent the major site of synthesis for atrial natriuretic peptide (ANP) which exerts potent natriuretic, diuretic and vasoactive functions.
(8) In a noncontracting in vitro preparation of combined right and left atria we demonstrated by electron microscopy that, at 37 degrees C, transition from zero pressure to a physiological distending pressure of 5.1 mm Hg rapidly rendered atrial endocardial endothelium permeable to the macromolecular probes horseradish peroxidase (HRP; M(r), approximately 40,000) and wheat germ agglutinin-HRP (M(r), approximately 70,000); each probe was introduced at the atrial cavitary endocardial surface.
(9) There was no statistically significant difference in basal concentrations of immunoreactive atrial natriuretic peptide (ANP), as assessed by radioimmunoassay, between right and left atrial muscle of control rats; similarly, stereological analysis showed no statistically significant difference in the fractional volume of myocytes occupied by specific heart granules, or in numerical density of granules, between right and left atria.
(10) In the CS, myocarditis with fibrosis was found in all in the approaches to the sinoatrial (SA) node, the SA node, the atria, the atrioventricular (AV) node, and the bundle and bundle branches, to a varying degree.
(11) Spontaneously beating right atria increased ANP secretion by 2.3-fold in response to 10 nM endothelin without a change in beat frequency.
(12) Both compounds were less potent than isoprenaline in increasing either the rate of beating of isolated right atria or the contractile force of left atria, OPC-2009 being 4 and 127 times and salbutamol being 100 and 700 times less potent on the respective preparations.
(13) Although all of the primary particulate fractions exhibited binding activities, the bulk of the total homogenate binding activity was associated with the washed particles sedimenting at the lower gravitational forces; this was observed with either atria or ventricles of dog, guinea pig, rabbit, hamster, and rat.
(14) Furthermore, the long axis of the right and left atria was measured from the center of the apposed atrioventricular valve leaflets to the posterior atrial wall, and the sizes of the atrial chambers were defined using their widths at the prospective broadest points through the area of foramen ovale.
(15) 1 The positive inotropic and chronotropic responses to sympathomimetic amines were examined in guinea-pig isolated atria.
(16) These alterations highly resembled that triggered by spleen lymphocytes from autoimmune myocarditis mice, when they reacted with normal atria.
(17) The isolated atria from mice hyperimmunized with heart exhibited tachycardia, decrease in contractility and dysrhythmia.
(18) Implantation of multiple stimulating and recording electrodes allowed wavelength determination at four different areas: the right and left parts of Bachmann's bundle and the free walls of the right and left atria.
(19) In vitro, the spontaneously beating atria were significantly suppressed by dehydroevodiamine in a dose-dependent manner.
(20) The atria were studied at a pacing frequency of 0 or 3 Hz.
Stria
Definition:
(n.) A minute groove, or channel; a threadlike line, as of color; a narrow structural band or line; a striation; as, the striae, or groovings, produced on a rock by a glacier passing over it; the striae on the surface of a shell; a stria of nervous matter in the brain.
(n.) A fillet between the flutes of columns, pilasters, or the like.
Example Sentences:
(1) A similar response from one other tuberoinfundibular neurone followed stria terminalis stimulation at a latency of 11 msec.
(2) Lesion of the stria terminalis (st) fully or partly abolished GH release induced by ABL stimulation.
(3) AR and ER mRNA-containing neurons were widely distributed in the rat brain, with the greatest densities of cells in the hypothalamus, and in regions of the telencephalon that provide strong inputs in the medial preoptic and ventromedial nuclei, each of which is thought to play a key role in mediating the hormonal control of copulatory behavior, as well as in the lateral septal nucleus, the medial and cortical nuclei of the amygdala, the amygdalohippocampal area, and the bed nucleus of the stria terminalis.
(4) It is suggested that the velocity of the blood flow in the stria vascularis is slow and that the stria vascularis can retain much blood.
(5) injected at 13.45 h. Transection which interrupted the connection of septum (SEPT), diagonal band of Broca (DBB) and bed nucleus of stria terminalis (BST) with the preoptic-suprachiasmatic area interfered with ovulation and surge of release of all 3 hormones.
(6) Small foci of strial atrophy accompanied by loss of immunostaining for Na,K-ATPase were observed in the stria vascularis of the apical and basal turns as early as 5 months of age.
(7) Glucose appears to be an adequate substrate for stria in vitro since glutamate, pyruvate, and fumarate did not increase the respiratory rate.
(8) Inhibitory input onto most of the vasopressin responsive neurons studied was obtained following electrical stimulation of the paraventricular nucleus and bed nucleus of the stria terminalis, two cell groupings that are potential sources of vasopressin to the ventral septal area.
(9) The potential role of the habenula in the transsynaptic regulation of the activity of ascending dopaminergic systems has been investigated in the rat by studying the effect of an acute interruption of impulse traffic in the diencephalic conduction system (stria medullaris-habenula-fasciculus retroflexus) and of pharmacological manipulation of various neurotransmitter systems in the interpeduncular nucleus on dopamine metabolism in several dopaminergic projection fields.
(10) These experiments examined the effect of posttraining administration of naloxone and beta-endorphin in rats with lesions of the stria terminalis (ST).
(11) The levels of the adenine nucleotides ATP, ADP, and AMP in the stria vascularis were measured under normal conditions, and following various durations of ischemia.
(12) Furthermore, these findings demonstrate 195mpt localization in the vestibular labyrinth and confirm previous platinum distribution studies in the organ of Corti and stria vascularis tissues.
(13) Immunostaining for vimentin was found in the intermediate and basal cells of the stria vascularis of the normal mice.
(14) Relatively strong autofluorescence was found in the stria vascularis, the spiral ligament, the organ of Corti and in the basilar membrane.
(15) DYN B cell bodies were present in nonpyramidal cells of neo- and allocortices, medium-sized cells of the caudate-putamen, nucleus accumbens, lateral part of the central nucleus of the amygdala, bed nucleus of the stria terminalis, preoptic area, and in sectors of nearly every hypothalamic nucleus and area, medial pretectal area, and nucleus of the optic tract, periaqueductal gray, raphe nuclei, cuneiform nucleus, sagulum, retrorubral nucleus, peripeduncular nucleus, lateral terminal nucleus, pedunculopontine nucleus, mesencephalic trigeminal nucleus, parabigeminal nucleus, dorsal nucleus of the lateral lemniscus, lateral superior olivary nucleus, superior paraolivary nucleus, medial superior olivary nucleus, ventral nucleus of the trapezoid body, lateral dorsal tegmental nucleus, accessory trigeminal nucleus, solitary nucleus, nucleus ambiguus, paratrigeminal nucleus, area postrema, lateral reticular nucleus, and ventrolateral region of the reticular formation.
(16) One group of fibers enters the stria medullaris to terminate in the paraventricular nucleus and habenular nuclei.
(17) Total stria volume was estimated at 0.15 microliter.
(18) In the stria vascularis melanin was found to occur in three types of cells (heavily pigmented cells that appear to be melanocytes, intermediate cells and basal cells).
(19) No changes of stria vascularis were observed over passage of time.
(20) The cells of the necleus striae terminalis accompany the stria terminalis along its whole course between the anterior commissure and the corpus amygdaloideum.