EXS 235 Quiz 3 Answer Sheet [Type text][Type text][Type text] Name: _______________ 1. _______ 2. _______ 3. _______ 4. _______ 5. _______ 6. _______ 7. _______ 8. _______ 9. _______ 10. _______ 11....

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EXS 235 Quiz 3 Answer Sheet [Type text][Type text][Type text] Name: _______________ 1. _______ 2. _______ 3. _______ 4. _______ 5. _______ 6. _______ 7. _______ 8. _______ 9. _______ 10. _______ 11. _______ 12. _______ 13. _______ 14. _______ 15. _______ 16. _______ 17. _______ 18. _______ 19. _______ Short Answer questions: 20. Word bank: R. Ventricle L. Ventricle R. Atrium L. Atrium Aortic Semilunar Valve Tricuspid Valve Pulmonary Semilunar Valve Pulmonary Artery Pulmonary Veins Superior and Inferior Vena Cava Aorta Bicuspid Valve 21. ] 22. Lead Draw what the P wave will look like (assume normal depolarization) aVR Lead I Lead III EXS 235 Quiz 3 1. Which of the following represents the correct pathway of electrical conduction within the heart? a. R. and L. bundle branches Bundle of His SA node AV node Purkinje fibers b. Bundle of His R. and L. bundle branches SA node AV node Purkinje fibers c. Purkinje fibers AV node SA node Bundle of His R. and L. bundle branches d. SA node AV node Bundle of His R. and L. bundle branches Purkinje fibers e. AV node SA node R. and L. bundle branches Bundle of His Purkinje fibers 2. Substances tend to flow from an area of _____________ concentration to an area of _____________ concentration. a. High : Even Higher b. High : Low c. Low : High d. None of the above 3. Which of the following represents the events that occur during the QRS complex? a. Atrial Depolarization b. Ventricular Repolarization c. Atrial Repolarization d. Ventricular Depolarization e. Choices C and D 4. Which of the following best describes the image below. Hint: Follow the direction of the arrows and the letters off to the left a. Depolarization originates at the AV node where the cell becomes more positive and the signal travels from cell to cell until contraction occurs. Repolarization happens in the same direction of depolarization to prepare for the next contraction. b. Depolarization originates at the pacemaker cell where the cell becomes more positive, where the signal travels from cell to cell until contraction occurs. Repolarization happens in the opposite direction of depolarization to prepare for the next contraction. c. Depolarization originates at the AV node where the cell becomes more negative and the signal travels from cell to cell until contraction occurs. Repolarization happens in the opposite direction of depolarization to prepare for the next contraction. d. None of the above describe the above graphic e. Choice A and C are the same thing 5. The ventricles relax during the__________. a. P wave b. QRS Complex c. T wave d. Cannot be determined with the given information 6. During the P-R Segment there is a slight pause. Which of the following represents why there is a slight pause during this particular structure of the ECG? a. There is a large distance between the SA and AV nodes which results in a pause between the P wave and the QRS complex b. The slight delay allows for the atria to fill because the ventricles just contracted sending the blood inferiorly into the atria c. The slight delay allows for the ventricles to fill because the atria just contracted sending the blood inferiorly into the ventricles d. The question stem is incorrect the slight pause occurs during the S-T segment not the P-R Segment 7. Using the below ECG identify the duration of the P wave: a. 0.04 seconds b. 0.08 seconds c. 0.2 seconds d. 0.4 seconds e. 1 mm 8. Which of the following correctly describes the location of V2 electrode? a. Horizontal to V4, anterior axillary line b. 4th intercostal space left sternal border c. Halfway between V2 and V4 d. Right deltoid fossa, 2cm below clavicle but above pectoralis major e. L anterior axillary line, halfway between bottom of ribs and iliac crest (usually in-line with the umbilicus) 9. The 12 Lead ECG uses ________ electrodes a. 12 b. 10 c. 8 d. 6 10. Use the below graphic to identify how the waves of the ECG will look in two different positive leads (A and B) a. Lead A will be Upward facing while Lead B will be Downward facing b. Lead A will be Downward facing while Lead B will be Upward facing c. Lead A will be Biphasic while Lead B will be Upward facing d. Lead A will be Downward facing while Lead B will be Biphasic 11. In which lead would the QRS be most positive/upward facing (assume normal direction of depolarization)? a. aVL b. V1 c. Lead III d. V5 e. aVR 12. Blood in the R. Ventricle goes into what structure next? a. Aorta b. Pulmonary arteries c. Pulmonary veins d. R. Atria e. L. Atria 13. Using the below image which letter represents the location of Lead aVR on the clock-face? a. A b. B c. C d. D e. None of the above 14. In Lead II the P wave should normally be_________ (assume normal direction of depolarization). a. Downward facing b. Biphasic c. Upward facing d. Cannot be determined 15. A wave of repolarization traveling away from a positive electrode will cause what type of wave? a. Upward b. Downward c. Biphasic d. Cannot be determined with the above information. 16. Identify the true difference between arteries and veins a. Arteries always carry oxygenated blood whereas veins always carry deoxygenated blood b. Arteries take blood too the heart while veins take blood away from the heart c. Arteries have valves and veins do not d. Arteries take blood away from the heart while veins take blood to the heart 17. What is the structure between the two ventricles called? a. Interatrial septum b. Papillary muscle c. Interventricular septum d. Internodal tracts 18. ECG can be used for all of the following except: a. Diagnostics of disease b. Determining current cardiac events within the body c. Monitoring safety during strenuous exercise d. All of the above are uses for ECG 19. Use the following image to determine how the Q wave would look in Lead III a. Upward facing b. Downward facing c. Biphasic d. It can not be determined with the given information Short answer: Be sure to write you answer on the answer sheet 20. Label the structures on your answer sheet 21. Label the ECG on your answer sheet 22. Using the following image draw what the P wave would look like in aVR, Lead I and Lead III: Be sure to write you answer on the answer sheet