4. Which of the following pairs is mismatched? a. AV node = located at the base

Question

4. Which of the following pairs is mismatched? a. AV node = located at the base of the SVC b, P wave = depolarization of SA node and contraction of the atria c. SA node pacemaker d. T wave repolarization of ventricles e. Semilunar valves prevents back flow into the ventricles 4. The corresponding mechanical events of P wave and the QRS complex are _and repectively? a. contractions of the atria ; contractions of the ventricles and relaxation of atria b. depolarization of the atria and ventricles and repolarization of the ventricles; c. contraction of the ventricles; polarization of the SA Node and repolarization of atria d. contraction of the AV node; relaxation of the SA node; polarization of the atria and ventricles e. depolarization of the ventricles; repolarization of the atria; repolarization of ventricles 5. All of the following are true about ECG, EXCEPT: 1. it represents the electrical events of the conduction system 2. it provides information about the events of the cardiac cycle 3. it measures amplitude and duration 4. the QRS complex represents ventricular contractions and relaxation a. 2 and 4 b. 4 only c. 1 and 3 d. 3 only e. 1 and3 f. 2 only

Explanation / Answer

4. a. AV node = located at the base of the SVC

4. a. contractions of the atria; contractions of the ventricle and relaxation of the atria

5. b. 4 only

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