Cardiac_Physiology_Study_Questions

Cardiac_Physiology_Study_Questions - Cardiac Physiology...

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Cardiac Physiology Study Questions (select the single BEST answer) 1. The left side of the heart pumps blood to the lungs, the right side of the heart pumps blood to the rest of the body. A) true B) false 2. Blood in the left atrium enters the left ventricle through the _______ valve. A) pulmonary semilunar B) tricuspid C) bicuspid (mitral) D) aortic semilunar 3. The plateau of the cardiac action potential is caused by an increase in the permeability of which of the following? A) Na + B) K + C) Ca ++ D) B and C E) A, B, and C 4. The heart’s conduction system is specialized nerve cells. A) true B) false 5. Which of the following is the sequence of excitation in a normal heart? A) SA node, AV node, atrial myocardium, bundle of His, Purkinje fibers, ventricular myocardium B) SA node, atrial myocardium, AV node, bundle of His, ventricular myocardium, Purkinje fibers C) SA node, atrial myocardium, ventricular myocardium, AV node, bundle of His, Purkinje fibers D) SA node, atrial myocardium, AV node, bundle of His, Purkinje fibers, ventricular myocardium 6. If the SA node is damaged, and the AV node becomes the pacemaker of the heart, heart rate will most likely A) stay the same B) increase C) decrease 7. The atrial syncytium is separated from the ventricular syncytium by the heart’s fibrous skeleton except at the ________ (also called the “link to the ventricles”). A) SA node B) bundle of His C) Purkinje fibers D) AV node 8. Sympathetic impulses decrease the slope of the pacemaker potential. A) true B) false 9. In complete heart block, there is no correlation between A) QRS complexes and T waves B) P waves and QRS complexes C) both A and B D) neither A nor B 10. Which of the following is an uncoordinated contraction in which small areas of the myocardium contract and relax independently (and the myocardial cells fail to contract together)? A) flutter B) bradycardia C) tachycardia D) fibrillation 11. Which of the following causes the atrioventricular (AV) valves to close? A) ventricular pressure less than aortic pressure B) atrial pressure greater than ventricular pressure C) ventricular pressure greater than atrial pressure D) relaxation of the ventricles 12. Stroke volume is A) end diastolic volume + end systolic volume B) end diastolic volume – end systolic volume C) end systolic volume – end diastolic volume D) end systolic volume x end diastolic volume E) equal to end diastolic volume 13. The cardiac cycle for the right side of the heart is different than the cardiac cycle for the left side of the heart because A) the right side of the heart generates lower pressures B) the right side of the heart is thicker C) the right side of the heart generates higher pressures D) Band C 1
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14. Immediately before the atria contract during ventricular diastole, the ventricles are A) empty B) 20% full C) 70-80% full D) normally about 50% full 15. (You may need to answer after the Vascular Physiology Lecture) The maximum arterial pressure during the cardiac cycle is called the
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Cardiac_Physiology_Study_Questions - Cardiac Physiology...

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