Re: [HAPS-L] Absolute refractory period

["John Cornell" <jccornell@xxxxxxxxx>]

To all
During the absolute refractory period it is not possible to produce an action potential, regardless of the stimulus strength
The absolute refractory period ends when it is possible to stimulate the axon to produce another action  potential. The relative refractory period extend from the end of the absolute refractory period until the minimum stimulus strength will produce and action potential.
John

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On 2/13/07, Lapres, Jason H <Jason.H.Lapres@xxxxxxxxxx> wrote:

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

North Harris College

2700 WW Thorne

Winship 210E

Houston Texas 77090

281-618-7132

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From: HAPS-L-owner@xxxxxxxxxxx [mailto:HAPS-L-owner@xxxxxxxxxxx] On Behalf Of Herbert House
Sent: Tuesday, February 13, 2007 11:04 AM
To: HAPS-L@xxxxxxxxxxx
Subject: [HAPS-L] Absolute refractory period

 

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.

Comments appreciated.

Thanks,
Herb H

--
Herbert W. House
Professor of Biology    Phone: 336.278.6187
Elon University         Fax:   336.278.6258
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