Card Set Information
The period during which a heart chamber is contracting is called __.
The period during which a heart chamber is relaxing is called __.
During ventricular contraction, the AV valves remain __.
During ventricular relaxation, the AV valves remain __.
Heart sounds are due to __ in the heart tissues created by changes in blood flow.
The first sound of the cardiac cycle occurs when the __ valves are closing.
The second sound of the cardiac cycle occurs when the __ valves are closing.
The fibers of the cardiac conduction system are specialized __ tissue.
Normally, the __ node serves as the pacemaker of the heart.
The __ node is lcoated in the inferior portion of the interatrial septum.
The large fibers on the distal side of the AV node make up hte __.
The fibers that carry cardiac impulses from the interventricular septum into the myocardium are called __
An electrocardiogram is a recording of electrical changes occurring in the myocardium during the __.
Between cardiac cycles, cardiac muscle fibers remain __ with no detectable electrical changes.