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Herb, I think first we need to define which type
of excitable tissue this absolute refractory period refers to. I believe the
answer lies in the voltage at which the inactivation gate for the sodium ion
channel reopens, but it is different between types of neurons, skeletal muscle,
cardiac muscle, etc… I’m sure others will have more
specific answers. Jason LaPres Associate Professor of Biology Human Anatomy and Physiology 2700 WW Thorne Winship 210E 281-618-7132 From: Is there a definite point at which
the absolute refractory period ends? As when the resting membrane potential is
reached? Different figures show the absolute refractory period ending before,
at, or slightly after reaching the RMP. |