Exam 28: Heart

Which chamber of the heart normally has the thickest wall? Why is this thick wall helpful in accomplishing its function?

The muscular layer of the heart wall is the:

Which part of the conduction system of the heart is referred to as the pacemaker?

Which of the following would not cause an ectopic beat?

The blood entering the aorta has just left which heart chamber?

Which of the following is a semilunar valve?

A larger than normal U wave could indicate a high level of potassium in the blood.

The bulk of the heart wall is myocardium.

The most abundant blood supply in the heart goes to the left ventricle.

Cuspid valves open into:

Depolarization of the ventricles is:

Diastasis is a term used to describe a longer period of slow ventricular filling as ventricular diastole ends.

Blood in both atria must pass through a semilunar valve to get to the next structure in the heart.

As you might expect, most of the nerves leading to the heart end in the sinoatrial node.

A major function of the pericardial sac is protection against friction.

The pulmonary and aortic valves are also called _____ valves.

The internal layer of the tissue in the heart is the epicardium.

If damaged, which valve could allow blood to leak back into the left ventricle?

Tachycardia refers to a heart rate of more than 100 beats per minute.

A U wave on an ECG is an indication of damage to ventricular myocardial cells.