pacemaker cell वाक्य
उदाहरण वाक्य
मोबाइल
- Cardiac pacemaker cells ( autorhythmic cells ) are connected to adjoining contractile cells ( non-pacemaker cells ) via gap junctions.
- Hence, these cells generate the normal sinus rhythm and are called pacemaker cells as they directly control the heart rate.
- ICC-MY are present around the myenteric plexus and thought to be pacemaker cells for slow waves in the smooth muscle cells.
- The interstitial cells of Cajal are specialized pacemaker cells located in the wall of the stomach, small intestine, and large intestine.
- Pacemaker cells develop in the primitive atrium and the sinus venosus to form the sinoatrial node and the atrioventricular node respectively.
- At that point, her blood pressure rose and her P-waves reappeared, indicating the pacemaker cells had come out from under the Posicor.
- In heart pacemaker cells, " phase 0 " depends on the activation of L-type calcium channels instead of the fast Na + current.
- These T-type calcium channels are also found in pacemaker cells, the sinoatrial node ( SAN ) and the atrioventricular node ( AV ).
- Among other examples, Strogatz said, is the synchronization of thousands of pacemaker cells in the heart, each of which produces an electrical discharge.
- The Tbx18 gene is required for development of pacemaker cells in the heart during fetal development but is normally not functional after birth.
- The difference in pacemaker cells is that this potassium permeability ( efflux ) decreases as time goes on, partly causing the slow depolarization.
- Normally, the pacemaker cells of the sinoatrial node discharge at the highest frequency and are thus dominant over other cells with pacemaker activity.
- There is also evidence that digoxin increases vagal activity, thereby decreasing heart rate by slowing depolarization of pacemaker cells in the AV node.
- That causes the whole cell to put out an even bigger " spark, " triggering neighboring pacemaker cells to do the same thing.
- But the conduction of action potentials and overall contraction rhythm will be slower than previously when the original pacemaker cells were controlling the rhythm.
- Every pacemaker cell is able to stimulate an electric impulse in the same manner as the sinoatrial node, and share analogous cardiac action potentials.
- If the rate from both the SA and AV node fall below the discharge rate of ventricular pacemaker cells, a ventricular escape beat ensues.
- The sinoatrial node is richly innervated by the autonomic nervous system, which up or down regulates the spontaneous firing frequency of the pacemaker cells.
- A few of the cells in a given SUVSM unit may behave as pacemaker cells, generating rhythmic action potentials due to their intrinsic electrical activity.
- In cardiac pacemaker cells this phase is due to a rapid outflow of K + and the closure of the L-type Ca 2 + channels.
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