Unit Review 3 - Kerry Rowe BIOL 3350-001 Unit 3 Review 1...

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Kerry Rowe BIOL 3350-001 October 19, 2010 Unit 3 Review 1. Where are the location openings of the coronary arteries? The coronary sinus just above the aortic valve 2. Describe the event that happens during ventricle systole. Isovolumetric contraction period and ejection period, blood is captured by the heart and then ejected 3. What is meant by ‘Preload’ work of the heart? The work imposed on the heart before the contraction begins, the amount of blood that the heart must pump with each beat 4. Describe Pulse Pressure, and what if any type of medication might be given for elevated pulse pressure. The intermittent ejection of blood from the left ventricle into the aorta at the onset of systole. Angiotensin-converting enzyme inhibitor or an ACE inhibitor may be prescribed. 5. Describe the Cardiac Cycle. The rhythmic pumping action of the heart. The tow parts are systole and diastole 6. What causes the closing of the AV valves, and what muscle(s) cause tension to better hold the valve? The chordae tendineae causes the closing and the papillary muscles cause tension to better hold the valve 7. What is the subvalvular apparatus? The chordae tendineae and papillary muscles 8. What is the arterial system, and where is the greatest pulse pressure in the arterial system? The large and medium-sized arteries and the arterioles. It is greatest in the peripheral medium- sized arteries. 9. In healthy adults, how many normal heart sounds are typically described and what are they? What causes the first heart sound and any others that exist? There are two normal heart sounds, they are systole and diastole. The first heat sound is caused by the closing of the AV valves and the second is caused by the closing of the semilunar valves. 10. Describe the isovolumetric contraction period of the cardiac cycle. Begins with the closure of the AV valves and occurrence of the first heart sound, heralds the onset of systole. 11. What greek words does the term tachycardia come from? In rapid tachycardia, why does the cardiac output fall? Tachys (rapid) and kardia (of the heart). Cardiac output falls because atrial kick is eliminated and can cause a reduction in diastolic filling time 12. What factors have the largest effect on the amount of blood flow? What disease(s) might decrease blood flow? A pressure difference between the two ends of a vessel or group of vessels and the resistance the blood must overcome as it moves through the vessel or vessels. Thrombosis and peripheral vascular disease might decrease blood flow 13. What is atherosclerosis and what part of the arterial system does affect? It is the hardening of the arterial walls due to a build up fatty materials, it affects the large and medium-sized arteries, such as the aorta and its branches, the coronary arteries and the large vessels the supply the brain.
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