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1. The “lub” sound of the cardiac cycle is caused by the closing of the
a. atrioventricular valves
b. semilunar valves
c. three way valves
d. chordae tendonae
2. The “dub” sound of the cardiac cycle is caused by the closing of the
a. atrioventricular valves
b. semilunar valves
c. three way valves
d. chordae tendonae
3. The P – Wave of an ECG represents
a. atrial repolarization
b. atrial depolartization
c. ventricular repolarization
d. ventricular depolarization
4. The QRS complex of an ECG represents
a. atrial repolarization
b. atrial depolartization
c. ventricular repolarization
d. ventricular depolarization
5. The natural pacemaker of the heart is called the
a. sinoatrial node
b. atrioventricular node
c. node of Ranvier
d. myocardium
6. The rhythmic expanding and contracting of an arterial wall that can be felt through the
skin is called the
a. cardiac cycle
b. blood pressure
c. diastole
d. pulse
7. All blood returning to the heart goes through the
a. aorta
b. vena cava
c. left ventricle
d. bicuspid valve
8. The double-layered serous membrane that surrounds the heart is the
a. epicardium
b. endocardium
c. myocardium
d. pericardium
9. What can an artificial pacemaker substitute for?
a. NA node
b. SA node
c. AV node
d. VA node
10. Which is the deepest layer of an artery?
a. tunica intima
b. tunica adventitia
c. tunica media
d. pericardium