What prevents the atria and the ventricles from contracting at the same time?

+1 vote

 

It takes time for hormones to diffuse from the atria to the ventricles to trigger contraction.

Pacemaker cells located in the atria fire before the pacemaker cells in the ventricles.

The electrical signal generated in the right atrium is delayed at the AV node before passing to the ventricles.

The Na+ channels responsible for initiating ventricular contraction are inactivated and need to return to their activated configuration to be electrically stimulated.

 

asked Dec 31, 2012 in Biology by anonymous
    

1 Answer

+1 vote

 

The electrical signal generated in the right atrium is delayed at the AV node before passing to the ventricles.

 

answered Dec 31, 2012 by Panda ~Expert~ (1,557 points)

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