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Physiology Practice Test: The Cardiovascular System - Cardiac Function
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Physiology Practice Test: The Cardiovascular System - Cardiac Function
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25 Questions

1. Which of the following is FALSE of sympathetic activity to the SA node?
2. The relative color (depth of redness) of blood is a direct indication of the amount of ________ bound to hemoglobin.
3. Which of the following describes second degree heart block?
4. What blood vessel carries deoxygenated blood to the lungs?
5. What phase of the cardiac cycle is the heart in when all four valves of the heart are closed and ventricular pressure is less than atrial pressure?
6. A decrease in afterload will lead to which of the following?
7. Blood enters the aorta throughout the entire cardiac cycle.
8. The SA node is innervated by ________.
9. Contraction of the heart is triggered by the central nervous system.
10. Which of the following variables is NOT involved in determining ventricular preload?
11. The AV node autorhythmic cells are the fastest depolarizing cells in the heart.
12. What phase of the cardiac cycle is the heart in when all four valves of the heart are open and ventricular pressure is less than atrial pressure?
13. Under resting conditions, heart rate is primarily under the control of what control system?
14. Whereas the contractile activity of skeletal muscle is called ________, that of cardiac muscle is ________ because the contraction originates within the musculature itself.
15. Which of the following is an effect of parasympathetic activity to the heart?
16. What causes the sounds that one hears as the heart beats?
17. Which of the following statements is FALSE of sympathetic activity on ventricular contractile cells?
18. What is occurring during ventricular ejection?
19. The opening and closure of the atrioventricular and semilunar valves is driven by ________.
20. Action potentials travel more quickly through the ventricular contractile cells than the conduction pathway.
21. The binding of a catecholamine to a beta adrenergic receptor will ________.
22. Which of the following functions in forming blood clots?
23. Which of the following hormones does NOT increase cardiac contractility?
24. An increase in heart rate can be mediated through which of the following?
25. When blood leaves the heart, it first enters what type of blood vessel?

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