(n.) The tip, top, point, or angular summit of anything; as, the apex of a mountain, spire, or cone; the apex, or tip, of a leaf.
(n.) The end or edge of a vein nearest the surface.
Example Sentences:
(1) After 1 year, anesthesia was induced with chloralose and an electrode catheter placed at the right ventricular apex.
(2) Following injections of HRP into the apex of the heart, the sinoatrial (SA) nodal region and the ventral wall of the right ventricle, we observed that HRP-labeled sympathetic neurons were localized predominantly in the right stellate ganglia, and to a lesser extent, in the right superior and middle cervical ganglia, and left stellate ganglia.
(3) It is therefore suggested that salt water adaptation triggers a cellular reorganization of the epithelium in such a way that leaky junctions (a low resistance pathway) appear at the apex of the chloride cells.
(4) When HRP was injected in the left ventricular wall or the apex, few labeled neurons were identified in the DMN.
(5) The length of the diaphragmatic wall of the heart in both the right and left ventricle was equal to the sum of the length of the inflow tract and the thickness of the ventricular wall at the apex.
(6) However, the external muscle fibers of the ventricles ran clockwise from base to apex toward the center of the vortex, which had a striking resemblance to the normal rather than the mirror image pattern.
(7) In the RAO view with the collimator flat against the chest there was better resolution of the cardiac apex.
(8) Their proliferating regions are located in the apex tip, where the various cells originate.
(9) In these tissues, the viral DNA replicated at the site of inoculation and was transported first to the roots, then to the shoot apex and to the neighboring leaves and the flowers.
(10) The vertical distances were compared with measurements taken from periapical radiographs between the apex of each mesial root and the superior border of the mandibular canal prior to sectioning.
(11) Three of six patients in whom treatment failed had disease at the vaginal apex.
(12) We recommend this skin incision for young patients with pneumothorax if the chest CT scan confirms that the bullae or blebs are localized to the apex of superior segment of the lower lobe.
(13) MRI only offered advantages over CT in lesions of the orbital apex, the upper part of the orbit, and in the diagnosis of inflammatory processes.
(14) In the accelerated protocol, one, two, and then three extrastimuli were introduced at each of three basic drive train cycle lengths (350, 400, and 600 msec) at the right ventricular apex; the procedure was repeated at a second right ventricular site.
(15) Magnetic resonance imaging of the chest in patients with lung cancer is being investigated, but current studies comparing it with CT demonstrate no definite advantage at this time, with the possible exception of the lung apex in which T1 weighted thin-section coronal views are useful.
(16) The apex to base lung distribution of 99Tcm-C and 81Krm appeared to be similar.
(17) If a web has a low apex angle and the skin is elastic, the length-width ratio may be as great as 1.5:1.
(18) Double product increase was inferior to that recorded before atenolol administration; the difference became significant after 2 months and reached its apex after 6 months of treatment.
(19) HRCT scans at the apex of the thorax in all nine patients scanned at this level showed that extrapleural fat with interspersed vessels accounted for most of the plain radiographic opacity.
(20) To determine if anodal excitation during bipolar stimulation facilitates the initiation of sustained monomorphic ventricular tachycardia, nonsustained polymorphic ventricular tachycardia, or repetitive ventricular responses, both bipolar and cathodal unipolar programmed ventricular stimulation with one to three extrastimuli delivered during ventricular pacing at two rates from the right ventricular apex were performed in 28 patients evaluated for spontaneous sustained ventricular tachycardia or ventricular fibrillation (11 patients), nonsustained tachycardia (eight patients), or syncope (nine patients).
Subapical
Definition:
(a.) Being under the apex; of or pertaining to the part just below the apex.
Example Sentences:
(1) From this subapical region, a descending bundle connects the array of IFs occupying the basal part of the cell.
(2) The technique consisted of a transoral approach followed by monocortical juxtaalveolar and subapical osteosynthesis without long-term intermaxillary fixation.
(3) In the subapical area there was a distinct enhancement of desmosomal connections.
(4) From day 20 until day 80, the most characteristic changes in the thyroid cells were the progressive accumulation of subapical peroxidase-positive exocytotic vesicles.
(5) However, the resolution of the fluorescence microscope is not great enough to reveal the exact pattern of depolymerization or the relative extent to which microvillar and subapical membrane actin pools contribute to overall depolymerization.
(6) A similar change from apical to subapical N-acetylglucosamine incorporation occurred after hyphae were subjected to an osmotic shock which did not inhibit protein synthesis.
(7) The middle zone epithelium comprises vacuolated cells lying among other cells containing abundant microtubules in their subapical cytoplasm.
(8) It is caused by an activation of preexisting apical Na-channels and not by fusion of subapical cytoplasmic vesicles with the apical membrane.
(9) The results indicate that there is a relatively small chance (5.6%) of including the genioglossus attachment in the lingual pedicle if an anterior mandibular subapical osteotomy is positioned 3 to 5 mm below the incisor apex but a large chance (65%) of including the genioglossus muscle when the osteotomy procedure includes the canine teeth.
(10) At other times, especially at 1600 and 0400 hr, morphometric parameters of rough endoplasmic reticulum (rER), Golgi complex, and subapical vesicles were prominently increased, although values for rER did not peak at 1600 hr.
(11) The conclusion that cycloheximide changed wall synthesis from extension at the apex to subapical thickening was supported by grain distributions on radioautograms of mutant hyphae labeled with galactose.
(12) Evidence suggests that in humans tuberculous disease usually arises at apical or subapical sites in the lungs seeded as a consequence of an early bacillemic phase of the infection.
(13) Simultaneously, proton efflux increases in the subapical region; the resulting decrease in cell wall pH should help plasticize the lateral walls, which may, in turn, facilitate the process of lateral swelling over the next few hours.
(14) Reduction of bladder response to ADH challenge could result from a reduced recycling of aggrephores, as they are associated with cytoskeletal elements in the subapical cytoplasm.
(15) Less intense subapical staining of G alpha s was also found in proximal tubule cells.
(16) While they contained absorptive features (canaliculi, pinocytotic and coated vesicles, and subapical vacuoles) in all regions, the principal cells of region II were filled with large, heterogeneous vacuoles (up to 5 microns in diameter), suggesting that they may be preferentially involved in transporting and digesting particulate material.
(17) The subapical junctional complex consists of tight and gap junctions.
(18) There was abundant vacuolization of individual ependymocytes, as well as in groups of them, and increased apical and subapical neurosecretory accumulations.
(19) Subapical osteotomies were performed in the left quadrant of the mandibles and maxillas of five dogs and six monkeys.
(20) Branching tubes temporarily show a new subapical CTC gradient.