Which layer of the pericardium is tough and fibrous, providing protection and anchoring the heart in the chest?

All of the following state the similarities between the cardiac muscle and skeletal muscle fibers except:

Where in the heart's conducting system does the atrial contraction finish, and the ventricular contraction commence?

Atrial flutter is characterized on an ECG by:

In the QRS complex on the ECG, any negative wave following after a positive wave is called:

After passing through the AV node, the electrical impulses travel along the:

The pacemaker cells can spontaneously depolarize until they reach the threshold for an action potential. These pacemaker cells are located in which region?

Which of the following can lead to the state of hyperpolarization in the pacemaker cells?

Which of the following correctly describes the sequence of events in a cardiac cycle?

Which of the following conditions is/are associated with a heart murmur?

Which of the following statements is not true about the dicrotic notch that occurs in the cardiac cycle?