Pre-Lab Quiz
ECG & Heart Sounds
Name _____________________AUID ____________Date___________
Please select the best answer to the following questions:
1. Which one of the following is responsible for generating the first heart sound?
A. Opening of the AV valves.
B. Closing of the semilunar valves.
C. Closing of the AV valves.
D. Opening of the semilunar valves.
2. Which one of the following is responsible for generating the second heart
sound?
A. Opening of the AV valves.
B. Closing of the semilunar valves.
C. Closing of the AV valves.
D. Opening of the semilunar valves.
3. Would the QRS complex in the ECG occur
A. Before the first heart sound is heard?
B. After the first heart sound is heard?
4. The cardiac cycle has two phases
A. Diastole, in which the ventricles contract; and systole in which the
ventricles relax.
B. Systole in which the ventricles contract; and diastole, in which the
ventricles relax.
C. Systole in which the atria contract; and diastole, in which the ventricles
contract.
D. Diastole, in which the atria relax; and systole, in which the ventricles relax.
E. Systole, in which the atria relax; and diastole, in which the atria contract.
5. In the electrocardiogram (ECG) of a normal cardiac cycle, the wave called T
corresponds to
A. Depolarization of the atria.
B. Depolarization of the ventricles.
C. Repolarization of the atria.
D. Repolarization of the ventricles.
E. More than one of the above.
Pre-Lab Quiz
ECG & Heart Sounds
6. Heart murmurs result from defective
A. Heart muscle.
B. Arterioles.
C. Ventricular contraction.
D. Blood supply to the heart.
E. Heart valves.