AP SEMESTER 2 EXAM 4

What is the function of the serous pericardium?

• Firmly anchors the heart to the primary vessels and thoracic cavity

• Produces pericardial fluid that decreases friction between the layers during pumping

• Serves as the medium for nutrient and waste exchange in the heart

• Lines and protects the inside of all four chambers of the heart

Which chamber of the heart receives blood from the inferior vena cava?

• Left ventricle

• Right ventricle

• Left atrium

• Right atrium

Where is the pacemaker of the cardiac conduction system located?

• In the apex of the heart

• On the inside of the cardiac septum

• In the wall of the right atrium

• Inside the left ventricle

What is the name of the heart valve located between the right atrium and ventricle?

• Mitral

• Bicuspid

• Tricuspid

• Pulmonary

What is the other anatomic name for the mitral valve?

• Tricuspid

• Bicuspid

• Pulmonary

• Semilunar

What chamber of the heart connects with the superior vena cava?

• Right ventricle

• Right atrium

• Left atrium

• Left ventricle

What portion of the cardiac conduction system serves as the pacemaker?

• Left bundle branch

• Sinoatrial node

• AV node

• Purkinje fibers

What is the name of the blood vessel that carries blood from the heart to the lungs?

• Pulmonary vein

• Pulmonary artery

• Respiratory aorta

• Thoracic artery

What are the two divisions of cardiovascular circulation?

• Arterial and venous

• Delivery and return

• Cardiac and full-body

• Pulmonary and systemic

What role do the intercalated discs found in cardiac muscle play in the contraction of the heart?

• Form specialized gap junctions that pass action potentials between fibers

• Form the atrioventricular bundle of the conduction system

• Initiate the action potential that creates contraction

• Attach the motor neurons that control contraction to the myocardium