An electrocardiogram would be definitive for diagnosing diseases involving the valves of the heart.
Indicate whether the statement is true or false.
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Question 2) The determinant of whether heart valves are open or closed is the pressure difference across them.
Indicate whether the statement is true or false.
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Question 3) Parasympathetic neurons release acetylcholine onto cells in the atria of the heart, but not onto cells of the ventricles.
Indicate whether the statement is true or false.
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Question 4) At rest, more blood flows to the skin and abdominal organs than to the lungs.
Indicate whether the statement is true or false.
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Question 5) The myocardial cells receive their blood supply from the coronary arteries that branch off from the aorta.
Indicate whether the statement is true or false.
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Question 6) A major difference between cardiac muscle cells and the cells in the cardiac conducting system is that the contractile cells do not undergo spontaneous depolarization.
Indicate whether the statement is true or false.
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Question 7) An ectopic pacemaker is an area of the myocardial conducting system, other than the atrioventricular node, that initiates cardiac depolarization.
Indicate whether the statement is true or false.
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Question 8) The sinoatrial node is normally the heart's pacemaker because it has the fastest spontaneous rate of diastolic depolarization.
Indicate whether the statement is true or false.
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Question 9) The wave of ventricle free wall contraction starts at the apex of the heart and travels toward the base.
Indicate whether the statement is true or false.
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Question 10) Which correctly describes functions of protein C?
A. It activates platelets and converts prothrombin to thrombin.
B. It activates clotting factor XII and platelets.
C. It binds to tissue factor and activates clotting factor VII.
D. It inactivates thrombin and converts fibrinogen to fibrin.
E. It inhibits clot formation and inactivates factors Va and VIIIa.
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