sinoatrial node sentence in Hindi
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- Cells in the sinoatrial node, located in the right atrium of the heart, spontaneously depolarize approximately 100 times per minute.
- Contractions in striated muscles are voluntary, except for the heart muscle, in which contractions are regulated involuntarily by the sinoatrial node.
- Unusually, this tachycardia is mediated by increased sympathetic activity to the sinoatrial node ( SAN ) with no fall in parasympathetic activity.
- Being myogenic, the heart's pace is maintained by pacemaker cells found in the sinoatrial node, located on the right atrium.
- Normally, the pacemaker cells of the sinoatrial node discharge at the highest frequency and are thus dominant over other cells with pacemaker activity.
- Wenckebach is credited for describing the median bundle of the heart's conductive system that connects the sinoatrial node to the atrioventricular node.
- While heart rhythm is regulated entirely by the sinoatrial node under normal conditions, heart rate is regulated by parasympathetic input to the sinoatrial node.
- While heart rhythm is regulated entirely by the sinoatrial node under normal conditions, heart rate is regulated by parasympathetic input to the sinoatrial node.
- Every pacemaker cell is able to stimulate an electric impulse in the same manner as the sinoatrial node, and share analogous cardiac action potentials.
- The sinoatrial node is richly innervated by the autonomic nervous system, which up or down regulates the spontaneous firing frequency of the pacemaker cells.
- The sinoatrial node surrounds the sinoatrial artery, which can run centrally ( in 70 % of individuals ) or off center within the node.
- These T-type calcium channels are also found in pacemaker cells, the sinoatrial node ( SAN ) and the atrioventricular node ( AV ).
- The M 2 muscarinic receptors decrease the heart rate by inhibiting depolarization of the sinoatrial node via coupled receptors and through modulation of muscarinic potassium channels.
- Induced sinoatrial node cells could be identified by their distinctive morphology at the site of injection in TBX18-transduced animals, but not in controls.
- The sinoatrial node uses calcium to cause a depolarising signal transduction pathway from the atrium through right and left atrioventricular bundle which communicates contraction to the ventricles.
- He is also famous for discovering the sinoatrial node, the component of the heart which makes it beat, with his student Martin Flack in 1906.
- The cardiac cycle is coordinated by a series of electrical impulses that are produced by specialised pacemaker cells found within the sinoatrial node and the atrioventricular node.
- During each heartbeat, a healthy heart has an orderly progression of depolarization that starts with pacemaker cells in the sinoatrial node, spreads out through the pacemakers.
- Any part of the heart that initiates an impulse without waiting for the sinoatrial node is called an ectopic focus and is, by definition, a pathological phenomenon.
- In the heart, cells in the sinoatrial node ( and, as backup, in the atrioventricular node ) contain cyclic nucleotide gated channels which determine the heart rhythm.
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