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Unformatted text preview: Cardiac physiology review questions: Part 1 1. Define myocardium, endocardium, endothelium. 2. Describe the flow of blood through the heart, including the valves. What is the purpose of the valves? 3. Describe the pulmonary circulatory circuit and the systemic circulatory circuit, including the structures involved. 4. What is valvular stenosis? 5. Draw the action potential for cardiac muscle cells. Describe the phases, including the ions involved. 6. How does the duration of an action potential in a cardiac muscle cell compare to the duration of an action potential in a skeletal muscle cell? What effect does this have on the refractory period? Why is this difference in a refractory period necessary for cardiac function? 7. Describe excitation-contraction coupling in cardiac muscle. Compare it to that of skeletal muscle and smooth muscle. How does the amount of Ca 2+ in the sacroplasm affect the strength of contraction? in the sacroplasm affect the strength of contraction?...
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- Spring '08