The Refractory period is when a second action potential is possible, but unlikely; second action potential only if the stimulus is sufficiently strong. The refractory period helps to prevent backflow of Sodium.
Hmm, well I guess periods just cause your vagina to bleed. But, I'm not sure if there is more period causes because I'm really young right now and let's just say I'm under 11 years old.
In absolute refractory period, none of channels are reconfigured, so that second active potential cannot be generated no matter how large the stimulus current is applied to the neuron.
In contrast,...