Last Modified: December, 2009. (J. Crimando)
Practice Quiz #10
1. Stenosis of the bicuspid/mitral atrioventricular valve may initially cause an increase of pressure in the:
a. superior and inferior venae cavae
b. left ventricle
c. pulmonary circuit d. coronary circuit
2. If an abnormally increased amount of connective tissue were to form connecting together the serous visceral and parietal pericardium, which of the following events would most likely result?
a. strengthening of the frail pericardial layers with an improvement of cardiac function
b. decreased fluid production in the pericardial cavity since it is no longer necessary
c. interference with the heart’s normal mechanical activity d. decreased friction between the visceral and parietal pericardial layers
3. Which of the following statements about cardiac output is CORRECT?
a. stroke volume can increase when the end diastolic volume decreases b. if a semilunar valve was partially obstructed, then the end systolic volume in the affected ventricle would decrease
c. a decreased venous return will cause an increased end diastolic volume
d. a decreased heart rate will cause an increased end diastolic volume
4. The coronary vessel external to the heart that empties blood into the right atrium is the:
a. superior vena cava
b. inferior vena cava
c. coronary sinus d. all of the above choices (a, b and c) are correct
5. The left ventricle is serviced by all of the following coronary vessels, EXCEPT the:
a. left coronary artery
b. anterior interventricular artery, (also known as left anterior descending artery)
c. marginal artery d. circumflex artery
6. Increased end-systolic volume results in:
a. more blood ejected from the ventricle per beat
b. higher cardiac output
c. more blood remaining in the ventricle after contraction d. higher end-diastolic volume
7. The superior vena cava drains all of the following organs, EXCEPT the:
a. arms
b. shoulders
c. abdomen d. head
e. neck
8. An excessively shortened PR-interval can have this effect on cardiac output (CO):
a. decrease CO because it reduces ventricular contraction time
b. decrease CO because it reduces ventricular fill time c. increase CO because it increases force of ventricular contraction
d. increase CO because it increases end-diastolic volume
9. An abnormal clot within a blood vessel that breaks loose and now travels in the blood is termed:
a. a thrombus
b. an aneurysm
c. an embolus d. a cerebrovascular accident
10. Increase in afterload in the aorta can have what affect on cardiac output (CO):
a. increase CO because of increased blood pressure and blood volume
b. increase CO because of increased elastic recoil of the aorta
c. decrease CO because of increased backpressure opposing ventricular ejection of blood d. decrease CO because of increased hydrostatic pressure and increased stroke volume
