Question 1
Compared to skeletal muscle, cardiac muscle ________.
◦ cells are larger than skeletal muscle cells
◦ lacks striations
◦ has gap junctions that allow it to act as a functional syncytium
◦ has more nuclei per cell
Question 2
During the period of ventricular filling ________.
◦ blood flows mostly passively through the atria and the open atrioventricular (AV) valves into the ventricles
◦ pressure in the heart is at its peak
◦ the atria remain in diastole
◦ the aortic and pulmonary semilunar valves are open