What is the event that creates the absolute refractory period?
a.Potassium leak channels close
b.Calcium voltage-channels close
c.Sodium voltage-gated channels inactivate and will not open until the membrane potential drops below threshold
d.Localized ion concentrations become imbalanced so abnormal current flows result
e.Potassium blocks the voltage-gated sodium channels, and continues to do so until removed by the Na+/K+ pump