#Question id: 11008
#Unit 7. System Physiology – Animal
Which of the following events is associated with the first heart sound?
#Question id: 11009
#Unit 7. System Physiology – Animal
What is the normal total delay of the cardiac impulse in the A-V node plus bundle?
#Question id: 11010
#Unit 7. System Physiology – Animal
Which of the following best explains how sympathetic stimulation affects the heart?
#Question id: 11011
#Unit 7. System Physiology – Animal
Which of the following conditions at the S-A node will cause heart rate to decrease?
#Question id: 11012
#Unit 7. System Physiology – Animal
If the Purkinje fibers, situated distal to the A-V junction, become the pacemaker of the heart, what is the expected heart rate?
#Question id: 11015
#Unit 7. System Physiology – Animal
A 65-year-old man had an EKG recorded at a local emergency room following a biking accident. His weight was 80 kg and his aortic blood pressure was 160/90 mm Hg. The QRS voltage was 0.5 mV in lead I and 1.5 mV in lead III. What is the QRS voltage in lead II