Question Quiz for chapter 20

1. The region between the two pleural cavities that contains the heart and great vessels is called the .....
2. Which layer of pericardium touches the heart
3. Why is the left ventricle more muscular than the right ventricle?
4. What factor could cause an increase in the size of the QRS complex of an electrocardiogram recording?
5. Why is there no wave corresponding to atrial repolarization on an ECG reading?
6. What is the most important factor in considering cardiac function over time?
7. What is the effect of NE binding to adrenergic receptors?
8. How does damage to the cardioinhibitory center of the medulla affect heart rate? Why?