What are pacemaker cells?
Cell -cellular cells are specialized cells that cause involuntary muscles and tissues to reduce or expansion. They are found in all involuntary muscle groups, including striped and smooth tissues. In the heart there are striped involuntary muscles, while smooth involuntary tissue can be found in several organs, including brain, blood vessels and digestive system.
Pacemaker cells have a specialized cell membrane that allows sodium and potassium to cross and lower their electrical pulses. Although many of these cells may exist in one place of the body, only one cell can be fired at a time. As soon as the first cell generates an electrical pulse, it triggers a chain reaction in other pacemaker cells.
These cells usually occur in the right atrium in an area known as a sinoatrial node. Electrical pulses generated by these cells cause the heart muscles to download. It also controls the speed of each contraction. The generate of pacemakers electriThe pulse approximately 70 times per minute when the heart is at rest and up to 160 times every minute during intensive exercise.
All heart cells are able to act as a cardiac cell. However, cells located in a sinoatrial node are considered primary because they are faster than other cells. As a result, they are mostly responsible for starting the chain reaction. The other cells are then secondary and will shoot if they do not start the chain reaction in the sinoatrial node. If the primary and secondary pacemaker cells cannot maintain a regular heart rhythm, an artificial pacemaker can be considered.
Cell -cellular cells in the brain have an impact on more than regulating muscle contractions. These cells can affect behavior, sleeping cycles and can affect how the brain perceives information. Other automatic entertainment, such as breathing, is also controlled by brain cardiacs; HRai role in involuntary contraction and dilatation of blood vessels and pupils as well as in peristalizing the digestive system. In these systems, however, the automatic nervous system plays a greater role in regulation than the cells of the pacemaker.