During the phase of the cardiac cycle called____ the entire heart is relaxed and
ID: 81529 • Letter: D
Question
During the phase of the cardiac cycle called____ the entire heart is relaxed and blood flows into al four chambers. During the phase of the cardiac cycle called____ the heart contracts beginning with the atria and then the ventricles. When the ventricles contract____ the snap closed. A defective heart valve can be identified by the sound of a(n)____ The ____or pacemaker, initiates the heartbeat by generating electrical impulses that spread across both Impulses are delayed briefly at the ____and are then transmitted through special fibers to the base of the ventricles strong contractions begin at the apex of the heart and drive blood up and out of the heart. A/(n) ____records the electrical changes that occur during the heartbeat and provides data on the health of the heart.Explanation / Answer
Answer:
1. During the phase of the cardiac cycle called diastole, the entire heart is relaxed and blood flows into all 4 chambers.
2. During the phase o the cardiac cycle called systole, the heart contracts beginning with the atria & then the ventricles.
3. When the ventricles contract, the atrioventricular (AV) valves snap closed.
4. A defective heart valve can be identified by the sound of a (n) heart Murmur.
5. Theb sinoatrial (SA) node, or pacemaker, initiates the heartbeat by generating electrical impulses that spread across both atria.
6. Impulses are delayed briefly at the atrioventricular (AV) node and are then transmitted through special fibers to the base of the ventricles. Strong contractions begin at the apex of the heart and drive blood up and out of the heart.
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