Login

Join for Free!
118907 members


Propagation of Action Potential

Human Anatomy, Physiology, and Medicine. Anything human!

Moderator: BioTeam

Propagation of Action Potential

Postby jackyM » Tue Jun 07, 2011 9:15 am

Hello all..
I would like to know the propagation procedure of action potential in these 3 situations:

1) propagation within the cell
2) Propagation from cell to cell
3) Propagation from cellular actiosn to ECG

As far as i understood , the propagation within the cell is basically the normal mode of propagation of action potential in neurons with these 5 phases :({1)Resting Potential 2)Threshold 3)Rising Phase 4)Falling Phase 5)Recovery}
The currents flowing inwards at a point on the axon during an action potential spread out along the axon, and depolarize the adjacent sections of its membrane. If sufficiently strong, this depolarization provokes a similar action potential at the neighboring membrane patches. Is this propagation within the cell??

How does it propagate from one cell to another? and also to ECG??

Thanks for any help
jackyM
Garter
Garter
 
Posts: 3
Joined: Tue Jun 07, 2011 9:07 am

Postby JackBean » Tue Jun 07, 2011 1:53 pm

from cell to cell is the action potential propagated through synapses ;) you could know that :roll:
what is ECG?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
User avatar
JackBean
Inland Taipan
Inland Taipan
 
Posts: 5690
Joined: Mon Sep 14, 2009 7:12 pm

Re: Propagation of Action Potential

Postby jackyM » Wed Jun 08, 2011 8:39 am

thnx for the reply... i was not sure abt synapses. thats y i asked.
ECG means Electro Cardiogram. I guess the propagation of cellular actionpotenial to ECG is same as Cardiac Action Potential.
http://en.wikipedia.org/wiki/Cardiac_action_potential
jackyM
Garter
Garter
 
Posts: 3
Joined: Tue Jun 07, 2011 9:07 am


Postby JackBean » Wed Jun 08, 2011 8:44 am

are we talking about neurons in 2), rigth?
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
User avatar
JackBean
Inland Taipan
Inland Taipan
 
Posts: 5690
Joined: Mon Sep 14, 2009 7:12 pm

Re: Propagation of Action Potential

Postby jackyM » Fri Jun 10, 2011 8:10 am

i was actully focussing on the action potential involving in the cardiac area i.e to find the relationship between cellular action potential and the electrical action as seen on the body surface, that is the ECG.
jackyM
Garter
Garter
 
Posts: 3
Joined: Tue Jun 07, 2011 9:07 am

Postby TATAbox » Mon Jul 25, 2011 6:23 pm

The action potential propagates from one myocyte to another through gap junctions. The electric currents produced by the exchange of ions through the cell membrane simply flow from one cell to the next through those junctions.
TATAbox
Garter
Garter
 
Posts: 1
Joined: Mon Jul 25, 2011 6:18 pm

Postby JackBean » Mon Aug 01, 2011 1:25 pm

OK, well then forget everything about the synapses
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
User avatar
JackBean
Inland Taipan
Inland Taipan
 
Posts: 5690
Joined: Mon Sep 14, 2009 7:12 pm


Return to Human Biology

Who is online

Users browsing this forum: No registered users and 2 guests