Deck 14: The Heart

Question 1

The QRS complex in an electrocardiogram results from

A) depolarization of the ventricles
B) depolarization of the atria
C) repolarization of the ventricles
D) repolarization of the atria

Answer 1

depolarization of the ventricles

Question 2

Which of the following is not a cause of heart failure?

A) valve disorder
B) cardiomyopathy
C) cor pulmonale
D) All of the above can cause heart failure.

Answer 2

All of the above can cause heart failure.

Question 3

The aortic semilunar valve is the valve

A) between the left atrium and left ventricle
B) that opens from the right ventricle into the artery
C) between the right atrium and right ventricle
D) that opens from the left ventricle into the artery

Answer 3

that opens from the left ventricle into the artery

Question 4

The pulmonary semilunar valve is the valve

A) between the left atrium and left ventricle
B) that opens from the right ventricle into the artery
C) between the right atrium and right ventricle
D) that opens from the left ventricle into the artery

Question 5

The apex of the heart lies _____,pointing toward the _____ lung.

A) just below the clavicle; right
B) touching the diaphragm; left
C) just below the clavicle; left
D) touching the diaphragm; right

Question 6

Another name for "hardening of the arteries" is

A) angina pectoris
B) myocardial infarction
C) atherosclerosis
D) embolism

Question 7

The first heart sound is caused by the closing of the _____ valve(s).

A) mitral
B) semilunar
C) tricuspid
D) both A and C

Question 8

Which structure is known as the "pacemaker" of the heart?

A) Purkinje fibers
B) sinoatrial node
C) atrioventricular node
D) bundle of His

Question 9

Blood entering an artery has just left which heart chamber?

A) left ventricle
B) left atrium
C) right ventricle
D) either A or C

Question 10

Which of the following is not true of the pericardium?

A) The parietal pericardium is also called the epicardium.
B) The pericardium is made up of two layers of fibrous tissue.
C) The fluid between the two layers of the pericardium helps reduce the friction caused by the beating heart.
D) All of the above are true of the pericardium.

Question 11

The tricuspid valve is the valve

A) between the left atrium and left ventricle
B) that opens from the right ventricle into the artery
C) between the right atrium and right ventricle
D) that opens from the left ventricle into the artery

Question 12

The T wave in an electrocardiogram results from

A) depolarization of the ventricles
B) depolarization of the atria
C) repolarization of the ventricles
D) repolarization of the atria

Question 13

Blood passing through the tricuspid valve has just left which heart chamber?

A) left atrium
B) left ventricle
C) right atrium
D) right ventricle

Question 14

The bicuspid or mitral valve is the valve

A) between the left atrium and left ventricle
B) that opens from the right ventricle into the artery
C) between the right atrium and right ventricle
D) that opens from the left ventricle into the artery

Question 15

The P wave in an electrocardiogram results from

A) depolarization of the ventricles
B) depolarization of the atria
C) repolarization of the ventricles
D) repolarization of the atria

Question 16

The second heart sound is caused by the closing of the _____ valve(s).

A) mitral
B) semilunar
C) tricuspid
D) both A and C

Question 17

Which of the following is not true of ventricles?

A) They are the lower chambers of the heart.
B) They are called the discharging chambers of the heart.
C) They have thicker walls than the atria.
D) All of the above are true of ventricles.

Question 18

Which structure is the part of the conduction system that actually makes the ventricles contract?

A) Purkinje fibers
B) sinoatrial node
C) atrioventricular node
D) bundle of His

Question 19

A heartbeat that is less than 60 beats per minute is called

A) tachycardia
B) bradycardia
C) sinus dysrhythmia
D) fibrillation

Question 20

Which of the following is not true of atria?

A) They are the upper chambers of the heart.
B) They are called the discharging chambers.
C) They have thinner walls than the ventricles.
D) All of the above are true of atria.

Question 21

The heart rests during systole.

Question 22

A stenosed pulmonary semilunar valve slows the blood moving into the artery that leads to the lung.

Question 23

The semilunar valves separate the atria from the ventricles.

Question 24

Another name for the parietal pericardium is the epicardium.

Question 25

The tricuspid valve is part of the left side of the heart.

Question 26

The thin layer of tissue that lines the chambers of the heart is called the visceral pericardium.

Question 27

The ventricles are the receiving chambers of the heart.

Question 28

An incompetent mitral valve allows blood to flow back to the right atrium.

Question 29

A mitral valve prolapse might cause an unusual first sound of the heart.

Question 30

Blood returning from the lung enters which heart chamber?

A) left atrium
B) left ventricle
C) right ventricle
D) right atrium

Question 31

The sequence of an impulse moving through the conduction system of the heart is

A) sinoatrial node,atrioventricular node,Purkinje fibers,bundles of His
B) atrioventricular node,Purkinje fibers,bundles of His,sinoatrial node
C) sinoatrial node,atrioventricular node,bundles of His,Purkinje fibers
D) sinoatrial node,bundles of His,atrioventricular node,Purkinje fibers

Question 32

A mitral valve prolapse is an example of an incompetent atrioventricular valve.

Question 33

The heart is doing the most work during systole.

Question 34

The myocardium is the working part of the heart.

Question 35

The two heart sounds are caused by the closing of the semilunar and atrioventricular valves.

Question 36

Blood leaving the superior vena cava enters which heart chamber?

A) left atrium
B) left ventricle
C) right ventricle
D) right atrium

Question 37

Cardiopulmonary resuscitation (CPR)is successful because of the heart's location in the body.

Question 38

The heart is located in the mediastinum.

Question 39

The apex of the heart is the most superior part of the heart located just below the clavicle.

Question 40

There is always a small amount of fluid between the visceral and parietal pericardium,but if too much fluid accumulates,the accumulation can lead to a serious condition called cardiac tamponade.

Question 41

Like most arteries,the aorta carries blood that is rich in oxygen.

Question 42

The cardiac output is always larger than the stroke volume.

Question 43

Angina pectoris is chest pain caused by the heart's inability to obtain enough oxygen.

Question 44

Atherosclerosis or "hardening of the arteries" is mostly caused by hereditary factors.

Question 45

It takes about 72 cardiac cycles to determine the cardiac output.

Question 46

The average cardiac output for a resting adult is about 2 L of blood.

Question 47

The sinoatrial node initiates contraction in the atria.

Question 48

Stroke volume is usually larger than cardiac output.

Question 49

The T wave of an electrocardiogram occurs with the depolarization of the atria.

Question 50

An embolism in the coronary arteries can lead to a myocardial infarction.

Question 51

The structures of the heart cells called the intercalated disks make the conduction of impulses through the heart much more efficient.

Question 52

Like most arteries,the pulmonary arteries carry blood that is rich in oxygen.

Question 53

The Purkinje fibers directly cause the contraction of the ventricles of the heart.

Question 54

The right and left coronary arteries are the first branch of the aorta.

Question 55

Unlike most veins,the pulmonary veins carry oxygen-rich blood.

Question 56

The bundle of His conducts impulses from the sinoatrial node to the atrioventricular node.

Question 57

The atrioventricular node is sometimes called the pacemaker for the heart.

Question 58

The force that pushes the blood through pulmonary circulation is the right atrium.

Question 59

Both the superior and inferior venae cavae enter the left atrium of the heart.

Question 60

The T wave of an electrocardiogram occurs with the repolarization of the ventricles.

Question 61

Cor pulmonale is a type of heart failure that is actually caused by a lung problem.

Question 62

If an electrocardiogram shows no relationship between the P wave and the QRS complex,an artificial pacemaker might be implanted to treat the condition.

Question 63

The chordae tendineae attach the semilunar valves to the wall of the heart.

Question 64

If a patient has an AV node block,the electrocardiogram will show that the ventricles are beating at a faster rate than the atria.

Question 65

The QRS complex of an electrocardiogram occurs with the depolarization of the ventricles.

Question 66

Right-sided heart failure can lead to pulmonary edema.

Question 67

A person with bradycardia has more QRS complexes per minute on an electrocardiogram than a person with tachycardia.

Question 68

The repolarization of the atria does not have a specific deflection on an electrocardiogram because the repolarization is hidden by the T wave of the ventricles.

Question 69

If damage to the heart caused an unusual deflection of the P wave,the damage probably occurred in one of the atria of the heart.

Question 70

A heart rate less than 55 beats per minute indicates bradycardia.

Question 71

An automatic external defibrillator requires training as an EMT or a paramedic for it to be effective.

Question 72

A heart rate of 110 beats per minute indicates tachycardia.

Question 73

In AV node heart block,there is no relationship between the P wave and the QRS complex in an electrocardiogram.

Question 74

Both electric shock and medication are used to treat fibrillation.

Question 75

Congestive heart failure is another term for left-sided heart failure.

Question 76

Because the atria set the pace for the heartbeat,atrial fibrillation is much more life threatening than ventricular fibrillation.

Question 77

Fibrillation occurs when the heart muscles lose coordination and beat out of step with each other.

Question 78

AV node heart block can be seen on an electrocardiogram as a large distance between the QRS complex and the T wave.

Question 79

A person with sinus dysrhythmia should be treated with an implanted artificial pacemaker.

Question 80

A premature contraction can be seen on an electrocardiogram as a longer than normal time between the T wave and the next P wave.