Exam 1: Cardiac Anatomy and Physiology

The semilunar valves open when the

The cardiac cycle refers to the mechanical events that occur to ________.

The pericardium is a double-walled sac that encloses the heart and serves as support and protection.

The second heart sound (S2)is associated with closure of which heart valves?

The left atrium pumps blood into the right atrium.

Which type of cardiac cells cause the heart muscle to contract?

The heart valve found at the opening of the pulmonary artery is the

Which of these statements about the pericardium is NOT true?

The parasympathetic nervous system causes

The heart chamber that has the greatest workload is the right atrium,as it pumps blood out to the entire body.

The half-moon-shaped valves are the ________ and the ________.

The vessel that delivers oxygenated blood to the capillary bed is the

The coronary artery that feeds blood to the right ventricle and the inferior wall of the left ventricle is the ________.

The heart is composed primarily of muscle.

The heart's top and bottom chambers are separated by valves that prevent backflow of blood.

The layer of the heart that does the work of contracting is the endocardium.

The coronary artery that feeds blood to the lateral wall of the left ventricle is the ________.

The first phase of diastole is called the atrial kick,and it is the phase during which the atria fill with blood from the ventricles.

The fight-or-flight response is

The vessel that delivers oxygenated blood to the anterior wall of the left ventricle is the