Question 1

Pressure in the right ventricle must exceed pressure in the ________ before the right ventricle can eject blood.

Accepted Answer

A)   superior vena cava
B)   coronary sinus
C)   pulmonary trunk
D)   aorta
E)   pulmonary veinsF) A) and E)
G) B) and C)

Question 2

Which of the following will depolarize immediately after the AV node depolarizes?

Accepted Answer

A)   The AV bundle
B)   Purkinje fibers
C)   Atrial myocardium
D)   Bundle branches in the ventricular septum
E)   The SA nodeF) A) and B)
G) A) and C)

Question 3

Which of the following statements about coronary vessels is true?

Accepted Answer

A)   The left coronary artery is a branch of the left pulmonary vein.
B)   The coronary sinus returns blood to the left atrium.
C)   The coronary arteries arise from the pulmonary trunk.
D)   The great cardiac vein collects blood from the left anterior surface of the heart.
E)   The pulmonary arteries carry blood to the left atrium.F) A) and B)
G) A) and C)

Question 4

The great cardiac vein and middle cardiac vein empty into a venous cavity called the

Accepted Answer

A)   pulmonary vein.
B)   inferior vena cava.
C)   superior vena cava.
D)   coronary sinus.
E)   coronary artery.F) A) and D)
G) A) and C)

Question 5

Occlusion of which of the following would primarily damage the posterior wall of the heart?

Accepted Answer

A)   Circumflex artery
B)   Pulmonary artery
C)   Right marginal artery
D)   Coronary sinus artery
E)   Right coronary arteryF) B) and E)
G) A) and E)

Question 6

The chordae tendineae

Accepted Answer

A)   connect the atria to the ventricles.
B)   are found in the interventricular septum.
C)   are part of the conducting system of the heart.
D)   connect the cusps of the AV valves to the papillary muscles.
E)   are a part of the myocardium.F) A) and C)
G) D) and E)

Question 7

Which blood vessel carries blood away from the left ventricle?

Accepted Answer

A)   Aorta
B)   Right atrium
C)   Pulmonary trunk
D)   Pulmonary arteries
E)   Pulmonary veinsF) B) and C)
G) A) and E)

Question 8

The relationship between preload and stroke volume is known as

Accepted Answer

A)   extrinsic regulation.
B)   cardiac reserve.
C)   Starling Law of the heart.
D)   minute volume.E) B) and C)
F) A) and D)

Question 9

Ezra is admitted to the cardiac unit with a diagnosis of endocarditis. When Ezra asks the nurse where the infection is located, the nurse replies that the infection is in

Accepted Answer

A)   the outer layer of the heart wall.
B)   the inner lining of the heart.
C)   a membranous sac that encloses the heart.
D)   the muscular layer of the heart.
E)   the lining of the mediastinum.F) C) and D)
G) A) and B)

Question 10

Another name for the visceral pericardium is the ________.

Accepted Answer

A)   endocardium
B)   epicardium
C)   isocardium
D)   myocardium
E)   visocardiumF) C) and D)
G) A) and E)

Question 11

The long plateau in the action potential observed in cardiac muscle cells is probably related with ________ staying longer in the cytoplasm.

Accepted Answer

A)   Na+
B)   K+
C)   Ca2+
D)   Cl−
E)   Na+, K+, and Ca2+F) A) and B)
G) All of the above

Question 12

Which of the following heart chambers is correctly associated with the blood vessel that enters or leaves it?

Accepted Answer

A)   Right atrium - pulmonary veins
B)   Left atrium - aorta
C)   Right ventricle - pulmonary trunk
D)   Left ventricle - superior vena cava and inferior vena cava
E)   Right atrium - aortaF) A) and B)
G) B) and D)

Question 13

Increased vagal stimulation would cause

Accepted Answer

A)   the heart rate to decrease.
B)   the heart rate to increase.
C)   force of contraction to increase.
D)   stroke volume to increase.
E)   no change in heart rate, stroke volume, or force of contraction.F) B) and E)
G) B) and D)

Question 14

A reduction in extracellular Ca2+ levels would lead to

Accepted Answer

A)   increased force of cardiac muscle contraction due to increased interactions between actin and myosin.
B)   decreased force of cardiac muscle contraction due to a lack of release of Ca2+ from the sarcoplasmic reticulum.
C)   heart block due to depolarization of the sarcolemma.
D)   heart block due to hyperpolarization of the sarcolemma.E) None of the above
F) A) and B)

Question 15

During the cardiac cycle,

Accepted Answer

A)   the right atrium and the right ventricle contract simultaneously.
B)   the two atria relax while the two ventricles contract.
C)   the left atrium contracts before the right atrium.
D)   all four chambers of the heart contract at the same time.
E)   all four chambers of the heart are in systole at the same time.F) None of the above
G) B) and D)

Question 16

Contraction of the papillary muscles would

Accepted Answer

A)   eject blood from the ventricles.
B)   prevent the AV valves from protruding into the atria.
C)   close the semilunar valves.
D)   cause the atria to eject their contents into the ventricles.
E)   open the semilunar valves.F) A) and B)
G) C) and E)

Question 17

The AV valve that is located on the same side of the heart as the origin of the aorta is the

Accepted Answer

A)   bicuspid or mitral valve.
B)   tricuspid valve.
C)   aortic semilunar valve.
D)   pulmonary semilunar valve.
E)   coronary sinus valve.F) C) and D)
G) A) and E)

Question 18

Why is it important to use an antibiotic other than ampicillin in the treatment of bacterial pneumonia?

Accepted Answer

A)   Because antibiotics such as ampicillin destroy the cell walls of cardiac muscle cells.
B)   Because antibiotics such as ampicillin cause the cells lining blood vessels to endocytose bacteria and deposit them in cardiac muscle tissue.
C)   Because antibiotics such as ampicillin are not effective in the treatment of bacterial pneumonia.
D)   Because antibiotics such as ampicillin destroy the cell walls of bacteria which cause a toxin to be released that will destroy cardiac muscle cells.E) A) and B)
F) All of the above

Question 19

Which of the following would result from a reduced function of the Na+ channels in the SA node?

Accepted Answer

A)   Depolarization would be delayed.
B)   The heart rate would decrease.
C)   Repolarization would not occur.
D)   The plateau phase would be shorter.
E)   Depolarization would be delayed, and the heart rate would decrease.F) B) and E)
G) A) and D)

Question 20

Variations in respiratory rate is a symptom of

Accepted Answer

A)   sinus arrhythmia.
B)   ventricular tachycardia.
C)   SA node block.
D)   paroxysmal atrial tachycardiaE) B) and D)
F) A) and B)

Exam 20: Cardiovascular System: the Heart

Increased vagal stimulation would cause

Correct AnswerverifiedShow Answer

Which of the following will depolarize immediately after the AV node depolarizes?

Correct AnswerverifiedShow Answer

The relationship between preload and stroke volume is known as

Correct AnswerverifiedShow Answer

The long plateau in the action potential observed in cardiac muscle cells is probably related with ________ staying longer in the cytoplasm.

Correct AnswerverifiedShow Answer

Which of the following heart chambers is correctly associated with the blood vessel that enters or leaves it?

Correct AnswerverifiedShow Answer

The great cardiac vein and middle cardiac vein empty into a venous cavity called the

Correct AnswerverifiedShow Answer

The chordae tendineae

Correct AnswerverifiedShow Answer

Which blood vessel carries blood away from the left ventricle?

Correct AnswerverifiedShow Answer

Pressure in the right ventricle must exceed pressure in the ________ before the right ventricle can eject blood.

Correct AnswerverifiedShow Answer

A reduction in extracellular Ca2+ levels would lead to

Correct AnswerverifiedShow Answer

Which of the following would result from a reduced function of the Na+ channels in the SA node?

Correct AnswerverifiedShow Answer

Which of the following statements about coronary vessels is true?

Correct AnswerverifiedShow Answer

Variations in respiratory rate is a symptom of

Correct AnswerverifiedShow Answer

Ezra is admitted to the cardiac unit with a diagnosis of endocarditis. When Ezra asks the nurse where the infection is located, the nurse replies that the infection is in

Correct AnswerverifiedShow Answer

The AV valve that is located on the same side of the heart as the origin of the aorta is the

Correct AnswerverifiedShow Answer

Contraction of the papillary muscles would

Correct AnswerverifiedShow Answer

During the cardiac cycle,

Correct AnswerverifiedShow Answer

Another name for the visceral pericardium is the ________.

Correct AnswerverifiedShow Answer

Why is it important to use an antibiotic other than ampicillin in the treatment of bacterial pneumonia?

Correct AnswerverifiedShow Answer

Occlusion of which of the following would primarily damage the posterior wall of the heart?

Correct AnswerverifiedShow Answer

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A reduction in extracellular Ca²⁺ levels would lead to

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Which of the following would result from a reduced function of the Na⁺ channels in the SA node?

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