Sinoatrial cells have a negative charge when resting
Cardiac skeleton forces the signal from the SA node to the AV node.
Pacemaker cells generate action potential
Sodium ions cause the sinoatrial membranes to become positive
Depolarization is when a membrane goes from negative to positive De-polar leaves the South Pole. Re-polar return to South Pole. De-plane is when I leave the plane
Purkinje fibers is the special tissue in the ventricles that carries the signal?
Resting potential must be established before a cell can be depolarized?
Action potential needs to travel for the heart to be in sync
Calcium ions enter when the sodium channels close. Soar. Plunge. Continue. Rapid Plunge
Potassium ions leave when sodium channels close and the cell has a high charge
Arrhythmia is caused by problems with electrical conduction
Atrioventricular node (AV) is found in the bottom of the right atrium Atrium meets ventricle. Bottom atrium
Sinoatrial node (SA) is found in the upper right atrium
Ions are charged atoms
Resting potential is -90 millivolts
The main ions outside the cell at rest are sodium
The main ions inside the cell at rest are potassium
Sodium channels open allowing voltage to become more positive
Sodium flows into the cell
Non-pacemaker cells conduct action potential
Sodium potassium pump maintains the concentration of sodium and potassium
Sodium potassium pump uses energy from ATP
3 Sodium ions move out, 2 potassium ions move in
Top and bottom chambers coordinate contractions through electrical signals
Abnormal levels of potassium and calcium ions can cause heart issues
