Chapter-18 the heart - Exam Name SHORT ANSWER Write the...

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Exam Name___________________________________ SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Figure 18.1 Using Figure 18.1, match the following: 1) Purkinje fibers. 1) 2) SA node. 2) 3) AV bundle. 3) 4) AV node. 4) 5) Bundle branches. 5) 1
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Figure 18.2 Using Figure 18.2, match the following: 6) Atrial depolarization. 6) 7) Point after which pressure begins to rise in the aorta. 7) 8) Ventricular repolarization. 8) 9) Point that represents the "dup" sound made by the heart. 9) 2
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Figure 18.3 Using Figure 18.3, match the following: 10) Ventricular fibrillation. 10) 11) Second - degree heart block. 11) 12) Junctional rhythm. 12) 13) Normal sinus rhythm. 13) 3
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MATCHING. Choose the item in column 2 that best matches each item in column 1. Match the following: 14) The inner lining of the heart. 15) Heart muscle. 16) Serous layer covering the heart muscle. 17) The outermost layer of the serous pericardium. A) Epicardium B) Myocardium C) Endocardium D) Parietal layer 14) 15) 16) 17) Match the following: 18) The pacemaker of the heart. 19) Found in the interventricular septum. 20) Network found in the ventricular myocardium. 21) The point in the conduction system of the heart where the impulse is temporarily delayed. 18) 19) 20) 21) Match the following: 22) Prevents backflow into the left ventricle. 23) Prevents backflow into the right atrium. 24) Prevents backflow into the left atrium. 25) Prevents backflow into the right ventricle. 26) AV valve with two flaps. 27) AV valve with three flaps. 22) 23) 24) 25) 26) 27) 4
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SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question. Figure 18.4 Using Figure 18.4, match the following: 28) Tricuspid valve. 28) 29) Mitral valve. 29) 30) Right atrium. 30) 31) Left ventricle. 31) 32) Pulmonary veins. 32) MATCHING. Choose the item in column 2 that best matches each item in column 1. Match the following: 33) Heart muscle is deprived of oxygen. 34) Death of heart muscle cells. A) Infarction B) Ischemia 33) 34) 5
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35) A condition of rapid and irregular or out - of - phase contraction of heart muscle cells. 36) An abnormal pacemaker. 37) Total heart relaxation. 35) 36) 37) TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. 38) The myocardium receives its blood supply from the coronary arteries. 38) 39) Cardiac muscle has more mitochondria and depends less on a continual supply of oxygen than does skeletal muscle. 39) 40) Anastomoses among coronary arterial branches provide collateral routes for blood delivery to the heart muscle. 40) 41) Congestive heart failure means that the pumping efficiency of the heart is depressed so that there is inadequate delivery of blood to body tissues. 41) 42) Tissues damaged by myocardial infarction are replaced by connective tissue. 42) 43) The left side of the heart pumps the same volume of blood as the right. 43) 44) Chronic release of excess thyroxine can cause a sustained increase in heart rate and a weakened heart. 44) 45) Arterial blood supply to heart muscle is continuous whether the heart is in systole or diastole. 45) 46) Trabeculae carneae are found in the ventricles and never the atria. 46) 47) The "lub" sounds of the heart are valuable in diagnosis because they provide information about the function of the heart's pulmonary and aortic valves. 47) 48) Autonomic regulation of heart rate is via two reflex centers found in the pons. 48) 49) The papillary muscles contract after the other ventricular muscles so that they can take up the slack on the chordae tendineae before the full force of ventricular contractions sends blood against the AV valve flaps. 49) 50) An ECG provides direct information about valve function. 50) 51) As pressure in the aorta rises due to atherosclerosis, more ventricular pressure is required to open the aortic valve. 51) 52) Proxysmal atrial tachycardia is characterized by bursts of atrial contractions with little pause between them. 52) 6
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MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 53) Normal heart sounds are caused by which of the following events? A) opening and closing of the heart valves B) friction of blood against the chamber walls C) excitation of the SA node D) closure of the heart valves
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