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Anatomy of the Heart Chapter 19

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Questions and Answers

What is the term for the contraction of the ventricles?

Isovolumetric relaxation

Systole (correct)

Diastole

Ventricular depolarization

What is the formula for calculating cardiac output?

CO = HR - SV

CO = HR / SV

CO = HR + SV

CO = HR x SV (correct)

What percentage of total blood volume is pumped out of the ventricles during each beat?

70%

50%

60% (correct)

40%

What is the term for the degree of stretch of cardiac muscle fibers?

Preload Signup and view all the answers

What is the result of increased contractility in the heart?

Increased stroke volume Signup and view all the answers

What is the term for the pressure that the ventricles must overcome to eject blood?

Afterload Signup and view all the answers

Which structure separates the right and left atria?

Interatrial septum Signup and view all the answers

What is the outer, thin membrane fused to the heart?

Epicardium Signup and view all the answers

What is the function of the chordae tendineae?

To anchor the valves to the papillary muscle Signup and view all the answers

Which valve is located between the left atrium and left ventricle?

Bicuspid valve Signup and view all the answers

What is the purpose of the sinoatrial (SA) node?

To generate the heartbeat Signup and view all the answers

What is the name of the bundle that connects the atria and ventricles?

Bundle of His Signup and view all the answers

What is the name of the wave that represents ventricular depolarization on an electrocardiogram?

QRS complex Signup and view all the answers

What is the name of the sac that surrounds the heart?

Pericardium Signup and view all the answers

What is the name of the valve that separates the right ventricle from the pulmonary trunk?

Pulmonary semilunar valve Signup and view all the answers

What is the name of the layer of tissue that lines the heart chambers?

Endocardium Signup and view all the answers