Question: The ______ atrium and ventricle are prominent when viewing the heart from the posterior view.

Answer: left

Question: Cardiac output is normally expressed as

Answer: 5 liters per minute

Question: Inotropic agents increase stroke volume by which mechanism?

Answer: increasing Ca2+ levels

Increasing contractility

Question: Put the sequence of events in the correct order to describe the initiation and conduction of an action potential through the heart.

Answer: SA node fires action potential

Action potential reaches AV node via gap junctions.

Action potential is delayed at the AV node.

Action potential travels down the bundle branches.

Action potential travels up the purkinje fibers.

Question: The three main components of the cardiovascular system are ______, blood vessels and the _____

Answer: Heart, blood

Question: Atrial contraction causes which to occur?

Answer: compresses the openings of the great veins

pushes blood into ventricles

Question: Factors that result in an increase in venous return include ______ and a decrease heart rate.

Answer: exercise

Question: Which are correctly identified as great vessels?

Answer: Aorta

Superior Vena Cava

Inferior Vena Cava

Question: The ______ ______ is the ability to reach threshold without stimulation.

Answer: pacemaker potential

Question: The ______ nervous system influences the heart rate.

somatic.

autonomic.

Answer: autonomic