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WorksheetsChapter 13 Test Bank
Total questions: 62
Worksheet time: 33mins
The atrioventricular (AV) node is responsible for starting the rhythmic contractions of the heart.
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false
Arteries are strong, elastic vessels that carry blood to the heart.
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false
Capillaries merge to form venules, which merge to form veins that carry blood back to the atria.
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false
The heart is in the pericardial cavity.
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false
In humans, circulation of the blood is a closed system.
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false
The top of the heart is called the base, and the pointed bottom of the heart is called the apex.
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false
The innermost layer of the pericardial sac that also covers the surface of the heart is the parietal pericardium.
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false
The endocardial layer of the heart wall is the innermost layer and is in direct contact with the blood.
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false
Blood that is pumped from the right ventricle passes through the aortic valve.
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false
The oxygen-rich vessels that supply the heart muscle with blood are the cardiac veins.
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false
Closure of the heart's four valves create the lubb-dupp sounds of a heartbeat.
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false
The cardiac conduction system is composed of a network of nerve fibers beginning with the sinoatrial (SA) node.
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Atrial repolarization produces the T waves seen in ECG tracings.
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Arteries carry blood away from the heart.
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false
Capillary walls are only one cell layer thick.
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false
Capillary exchange of gases, nutrients, and waste is accomplished by diffusion, osmosis, and filtration.
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false
When the ventricles relax, blood pressure drops to a minimum value known as the systolic pressure.
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false
All venous blood returns to the heart through the superior or inferior vena cava.
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false
Which of the following is technically not part of the cardiovascular system?
Heart
Artery
Vein
Lung
What is the function of the pulmonary circuit?
Sends oxygen-poor blood to the heart
Brings oxygen-poor blood from the tissues
Sends oxygen-poor blood to the lungs
Brings oxygen-rich blood to the tissues
What is the outermost membrane that forms a loose-fitting sac around the heart called?
Fibrous or parietal pericardium
Epicardium
Endocardium
Visceral pericardium
Which of the following represents the correct sequence of structures through which blood moves from the venae cavae to the lungs?
Right atrium, pulmonary valve, right ventricle, tricuspid valve
Right atrium, tricuspid valve, right ventricle, pulmonary valve
Tricuspid valve, right atrium, pulmonary valve, right ventricle
Right ventricle, tricuspid valve, right atrium, pulmonary valve
What happens to the valves when the ventricular walls relax?
Mitral valve opens and the tricuspid valve closes.
Tricuspid valve opens and the mitral valve closes.
Mitral and tricuspid valves close.
Mitral and tricuspid valves open.
Which of the following structures does not require stimulation from nerve fibers or other agents?
Papillary muscles
Sinoatrial node
AV bundle
Ventricular cardiac cells
What is the correct sequence of structures of the cardiac conduction system?
AV node, SA node, Purkinje fibers, AV bundle
AV node, AV bundle, Purkinje fibers, SA node
SA node, Purkinje fibers, AV node, AV bundle
SA node, AV node, AV bundle, Purkinje fibers
In an ECG pattern, what event is represented by the P wave?
Repolarization of the atrial muscle fibers
Repolarization of the ventricular muscle fibers
Depolarization of atrial muscle fibers
Depolarization of ventricular muscle fibers
In an ECG pattern, what event is represented by the T wave?
Repolarization of atrial muscle fibers
Repolarization of ventricular muscle fibers
Depolarization of atrial muscle fibers
Depolarization of ventricular muscle fibers
In an electrocardiogram (ECG) pattern, the P-Q interval indicates how long it takes for the cardiac impulse to travel between what two places?
Sinoatrial (SA) node through the atrioventricular (AV) node
Atrioventricular (AV) node to the atrial muscle fibers
Atrioventricular (AV) node to the ventricular muscle fibers
Sinoatrial (SA) node to the ventricular muscle fibers
Which of the following is not a branch of the aorta?
Right coronary artery
Pulmonary artery
Brachiocephalic artery
Left subclavian artery
In normal circulation, blood flow usually follows what pattern of vessels?
A) Artery, arteriole, capillary, venule, vein
B) Artery, vein, capillary, venule, arteriole
C) Vein, venule, capillary, arteriole, artery
D) Venule, vein, capillary, artery, arteriole
Blood flow travels from the heart to the lungs for gas exchange and then back to the heart. Which circuit does this best describe?
Portal circuit
Parietal circuit
Pulmonary circuit
Systemic circuit
What circuit sends oxygen-rich blood from the heart to all cells of the body, removes carbon dioxide and other wastes, and returns blood to the heart?
Portal circuit
Visceral circuit
Pulmonary circuit
Systemic circuit
What is the outermost layer of the actual heart wall called?
Epicardium
Myocardium
Parietal pericardium
Endocardium
What layer of the heart wall is mostly cardiac muscle tissue?
Epicardium
Myocardium
Endocardium
Pericardium
What valve separates the left atrium from the left ventricle?
Mitral valve
Tricuspid valve
Pulmonary valve
Aortic valve
What valve would blood pass through in order to enter the right ventricle?
Mitral valve
Tricuspid valve
Pulmonary valve
Aortic valve
What chamber of the heart pumps blood to the lungs?
Left ventricle
Right ventricle
Left atrium
Right atrium
What term refers to the contraction of the heart?
Systole
Diastole
Vasoconstriction
Vasodilation
What term refers to the relaxation of the heart?
Systole
Diastole
Vasodilation
Vasoconstriction
What is the complete set of contraction and relaxation events that constitutes one heartbeat called?
Systole
Stroke volume
Cardiac cycle
Diastole
During ventricular contraction and blood ejection, what are the position of the valves?
The atrioventricular valves are open and semilunar valves are closed.
The atrioventricular valves are closed and semilunar valves are open.
The atrioventricular and semilunar valves are closed.
The atrioventricular and semilunar valves are open.
What is the pacemaker of the heart?
Sinoatrial (SA) node
Autonomic nervous system
Atrioventricular (AV) node
Purkinje fibers
What part of the ECG pattern is due to depolarization of the ventricles?
P wave
PR interval
QRS complex
T wave
Depolarization of the atria is an electrical event that produces what pattern in an ECG tracing?
P wave
PR interval
QRS complex
T wave
What is the term for a resting heart rate that exceeds 100 beats per minutes?
Hypercardia
Hypertension
Tachycardia
Bradycardia
What is the term for an abnormally slow heart rate (fewer than 60 beats per minute)?
Hypocardia
Hypertension
Tachycardia
Bradycardia
What is the term given to the alternating systolic and diastolic blood pressure that can be palpated?
Pulse
Hypertension
Cardiac output
Mean arterial pressure
Normal resting heart rate is closest to which range?
50 – 55 beats per minute
70 – 75 beats per minute
85 – 90 beats per minute
95 – 100 beats per minute
How does heart rate affect blood pressure?
Elevated heart rate decreases stroke volume, therefore raising blood pressure.
Elevated heart rate increases cardiac output, therefore raising blood pressure.
Elevated heart rate increases peripheral resistance, therefore raising blood pressure.
Elevated heart rate increases blood viscosity, therefore raising blood pressure.
The coronary arteries are a branch off of which artery?
Aorta
Coronary sinus
Pulmonary trunk
Brachiocephalic trunk
Which vessels supply blood to the myocardium?
Coronary arteries
Cardiac veins
Superior and inferior venae cavae
Internal and external carotid arteries
The ventricular walls and the atrial walls each form a functional syncytium. What does this term mean?
A mass of cells functioning as a unit
A structure that contains blood
A hollow structure lined by endothelium
Tissue with a high rate of blood flow
Identify the heart chamber
Left atrium
Right atrium
Left ventricle
Right ventricle
The long fibers of connective tissue that attach to papillary muscles of the heart that enable the valves to properly open and close are called:
Chordae tendinae
Cardiac tendons
Cardiac ligaments
Myocardial tendinae
What is Number 9
(a)
This part of the heart separates the left and right heart chambers.
Mitral valve
Septum
Aortic valve
Inferior vena cava
Which are larger, atria or ventricles?
atria
ventricles
The right side of the heart contains...
Oxygenated Blood
De-oxygenated Blood
Both Oxygenated and De-oxygenated Blood
Water
Chamber that receives oxygenated blood from the lungs.
left atrium
right atrium
left ventricle
right ventricle
