Exam 17: The Cardiovascular System I: the Heart

List the four phases of the cardiac cycle.

Predict the effect on the length of the R ^-R interval of an electrocardiogram (ECG) if a patient experiences bradycardia.

The right and left coronary arteries receive blood from the:

Match the following with the waves, segments, or intervals on the electrocardiogram (ECG). -Identify the interval that can be used to measure heart rate.

How do cardiac cells sustain a membrane potential of around 0 mV during the long plateau phase?

Match the following structures with the internal heart anatomy. -Identify the left ventricle.

Which of the following decreases heart rate?

Which part of the electrocardiogram (ECG) would ^most be affected by abnormally slow depolarization of the ventricles?

A damaged right bundle branch will prevent the passage of the action potential to the:

The visceral pericardium is the same as the:

Predict the effects on valve function and blood flow through the heart for a patient who has ruptured chordae tendineae that anchor the mitral valve.

The degree of stretch experienced by the sarcomeres in the ventricle cells before they contract is called:

What is the most superficial layer of the pericardial sac?

Which vessel supplies the systemic circuit with oxygenated blood?

Which two arteries arise from the right coronary artery?

Match the following structures with the internal heart anatomy. -Identify the pulmonary trunk.

What vessel delivers oxygenated blood to systemic capillaries for gas exchange?

Which of the following is NOT a population of pacemaker cells in the heart?

Match the following structures with the internal heart anatomy. -Identify the papillary muscle.

The cardiac conduction system is normally regulated by a population of pacemaker cells known as the sinoatrial (SA) node.