Blood flow through the coronary blood vessels decreases during myocardial contraction and increases during myocardial relaxation.
Indicate whether the statement is true or false.
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Question 2) Which of the following is NOT an enzyme given to someone experiencing a myocardial infarction to break up blood clots?
A. streptokinase
B. tissue plasminogen activator (t-Pa)
C. nitroglycerin
D. urokinase
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Question 3) Angina pectoris is chest pain caused by reduced
A. stimulation of the myocardium.
B. blood supply to cardiac muscle.
C. fluid in the pericardial sac.
D. contractility of the heart.
E. action potentials from SA node.
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Question 4) The procedure whereby a small balloon is placed into a partially occluded coronary artery and then inflated to increase blood flow through the artery is called a(n)
A. angioplasty.
B. coronary bypass.
C. urokinase injection.
D. tissue plasminogen activation.
E. angiogram.
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Question 5) Coronary artery disease can diminish myocardial blood flow resulting in the death of myocardial cells. This condition is known as a myocardial
A. attack.
B. angina.
C. necrosis.
D. cirrhosis.
E. infarction.
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Question 6) Occlusion of which of the following would primarily damage the posterior wall of the heart?
A. circumflex artery
B. pulmonary artery
C. right marginal artery
D. coronary sinus artery
E. right coronary artery
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Question 7) All cardiac veins empty into the _________, which then empties into the _______.
A. coronary sinus; left atrium
B. coronary sinus; right atrium
C. great cardiac vein; right atrium
D. great cardiac vein; superior vena cava
E. inferior vena cava; left atrium
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Question 8) A direct connection between arteries is called a/an
A. auricle.
B. sulcus.
C. sinus.
D. anastamosis.
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Question 9) Blood in the pulmonary veins returns to the
A. right atrium.
B. left atrium.
C. right ventricle.
D. left ventricle.
E. coronary sinus.
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Question 10) The great cardiac vein and middle cardiac vein empty into a venous cavity called the
A. pulmonary vein.
B. inferior vena cava.
C. superior vena cava.
D. coronary sinus.
E. coronary artery.
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