CARDIO ACTION POTENTIAL

• Fast response action potentials

  • Non-pacemaker: atrial and ventricular contractile cells
• Slow response action potentials

  • Pacemaker cells - sinoatrial and atrioventricular nodes
• Each muscles has different resting membrane potential. RMP means at rest and no transfer of ions (stable)
• Action potential: The movement of positively charged ions (sodium, potassium, and calcium) inside and outside the cell. 
• Threshold: A point in the action potential where the electrical charge is strong enough to trigger the heart to begin contracting.