Question 1

Small changes in _____________ will have a large impact on the heart's pumping effectiveness, while large changes in ___________ do not impact the effectiveness much.

Accepted Answer

A)   afterload; preload
B)   preload; afterload
C)   contractility; preload
D)   afterload; contractility
E)   contractility; afterloadF) A) and D)
G) A) and E)

Question 2

An increase in extracellular calcium generally increases

Accepted Answer

A)   the heart rate.
B)   the force of contraction.
C)   autonomic stimulation of the heart.
D)   sodium channel opening.
E)   the frequency of the action potentials.F) A) and B)
G) A) and C)

Question 3

A knowledge of heart location would NOT be important for which of the following?

Accepted Answer

A)   Blood pressure readings
B)   Stethoscope positioning
C)   Electrocardiogram
D)   Cardiopulmonary resucitationE) A) and D)
F) B) and C)

Question 4

Which of the following is true?

Accepted Answer

A)   Blood enters the right and left atria only during diastole.
B)   Most ventricular filling occurs before the atria contract.
C)   During ventricular systole, the AV valves open.
D)   The semilunar valves remain closed throughout ventricular systole.
E)   Most of end-diastolic volume comes from active filling.F) All of the above
G) D) and E)

Question 5

During hemorrhagic shock in which blood pressure is decreased, which of the regulatory mechanisms is most important is increasing cardiac output to help maintain blood pressure?

Accepted Answer

A)   increased sympathetic stimulation of the heart
B)   increase venous return
C)   increase in parasympathetic stimulation of the heart
D)   increase vagal stimulation of the heart
E)   increase in the amplitude of the heart soundsF) C) and D)
G) All of the above

Question 6

Blood vessels enter and exit from the _____ of the heart.

Accepted Answer

A)   apex
B)   base
C)   auricles
D)   trigone
E)   inferior aspectF) A) and B)
G) B) and D)

Question 7

From the right ventricle, blood flows directly into the _____.

Accepted Answer

A)   aorta
B)   right atrium
C)   pulmonary trunk
D)   pulmonary arteries
E)   pulmonary veinsF) C) and E)
G) A) and D)

Question 8

In a normal electrocardiogram, the

Accepted Answer

A)   P wave results from repolarization of the atria.
B)   QRS complex results from ventricular depolarization.
C)   P wave occurs after the QRS complex but before the T wave.
D)   T wave represents depolarization of the atria.
E)   repolarization of the atria is clearly visible.F) B) and E)
G) B) and D)

Question 9

All of the following are functions of the heart, except _____________________.

Accepted Answer

A)   generating blood pressure
B)   separating pulmonary and systemic circulations
C)   moving blood in one direction
D)   adjusting blood supply, depending on tissue needs
E)   adjusting blood gas levels, depending on tissue needsF) C) and D)
G) A) and B)

Question 10

Where is blood moving during the period of ejection?

Accepted Answer

A)   Ventricles to atria
B)   Ventricles to great vessels
C)   Atria to ventricles
D)   Atria to great vessels
E)   Great vessels to ventriclesF) A) and B)
G) A) and E)

Question 11

The chamber of the heart that endures the highest pressure is the

Accepted Answer

A)   right atrium.
B)   left atrium.
C)   right ventricle.
D)   left ventricle.
E)   coronary sinus.F) A) and D)
G) None of the above

Question 12

The peripheral chemoreceptors that respond to oxygen levels of the blood and regulate heart activity are located in _______________.

Accepted Answer

A)   the left ventricle
B)   the infundibulum of the hypothalamus
C)   structures near the carotids and aortic arch
D)   the medulla oblongata
E)   the right ventricleF) A) and B)
G) A) and C)

Question 13

Fred was admitted to the cardiac unit with chest pains. No arrhythmias and no large changes in the heart rate were observable. Blood samples taken over the next few days showed no increase in enzymes such as creatine phosphokinase. A possible treatment of the condition is

Accepted Answer

A)   beta adrenergic blocking agents.
B)   nitroglycerin.
C)   calcium channel blocking agents.
D)   aspirin.
E)   exercise.F) A) and B)
G) B) and D)

Question 14

Excess potassium ions in cardiac tissue cause

Accepted Answer

A)   an increased heart rate.
B)   a rapid repolarization of cardiac cells.
C)   a decrease in the frequency of action potentials in the conduction system.
D)   an increase in stroke volume.
E)   an increase in the frequency of action potentials.F) B) and C)
G) A) and E)

Question 15

Regurgitation of blood flow through the aortic semilunar valve would give rise to

Accepted Answer

A)   the first heart sound.
B)   the second heart sound.
C)   a heart murmur.
D)   an extra heart beat.
E)   end-systolic volume.F) A) and C)
G) C) and D)

Question 16

Blood does not enter or leave the ventricles during the period called

Accepted Answer

A)   ejection.
B)   rapid filling.
C)   atrial systole.
D)   isovolumetric contraction.
E)   active and passive filling.F) A) and D)
G) C) and E)

Question 17

Another name for the visceral pericardium is the

Accepted Answer

A)   endocardium.
B)   epicardium.
C)   isocardium.
D)   myocardium.
E)   visocardium.F) A) and B)
G) A) and C)

Question 18

Variations in respiratory rate is a symptom of

Accepted Answer

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

Question 19

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) A) and B)
G) A) and C)

Question 20

Why is body temperature sometimes reduced during heart surgery?

Accepted Answer

A)   to slow respiration
B)   to increase heart rate
C)   to decrease heart rate
D)   to increase the oxygen content of bloodE) A) and D)
F) A) and C)

Exam 20: Cardiovascular System: the Heart

Variations in respiratory rate is a symptom of

Correct AnswerverifiedShow Answer

A knowledge of heart location would NOT be important for which of the following?

Correct AnswerverifiedShow Answer

From the right ventricle, blood flows directly into the _____.

Correct AnswerverifiedShow Answer

Small changes in _____________ will have a large impact on the heart's pumping effectiveness, while large changes in ___________ do not impact the effectiveness much.

Correct AnswerverifiedShow Answer

The chamber of the heart that endures the highest pressure is the

Correct AnswerverifiedShow Answer

The peripheral chemoreceptors that respond to oxygen levels of the blood and regulate heart activity are located in _______________.

Correct AnswerverifiedShow Answer

Blood does not enter or leave the ventricles during the period called

Correct AnswerverifiedShow Answer

Blood vessels enter and exit from the _____ of the heart.

Correct AnswerverifiedShow Answer

Increased vagal stimulation would cause

Correct AnswerverifiedShow Answer

An increase in extracellular calcium generally increases

Correct AnswerverifiedShow Answer

Fred was admitted to the cardiac unit with chest pains. No arrhythmias and no large changes in the heart rate were observable. Blood samples taken over the next few days showed no increase in enzymes such as creatine phosphokinase. A possible treatment of the condition is

Correct AnswerverifiedShow Answer

Why is body temperature sometimes reduced during heart surgery?

Correct AnswerverifiedShow Answer

Another name for the visceral pericardium is the

Correct AnswerverifiedShow Answer

Which of the following is true?

Correct AnswerverifiedShow Answer

Regurgitation of blood flow through the aortic semilunar valve would give rise to

Correct AnswerverifiedShow Answer

Excess potassium ions in cardiac tissue cause

Correct AnswerverifiedShow Answer

During hemorrhagic shock in which blood pressure is decreased, which of the regulatory mechanisms is most important is increasing cardiac output to help maintain blood pressure?

Correct AnswerverifiedShow Answer

Where is blood moving during the period of ejection?

Correct AnswerverifiedShow Answer

All of the following are functions of the heart, except _____________________.

Correct AnswerverifiedShow Answer

In a normal electrocardiogram, the

Correct AnswerverifiedShow Answer

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Small changes in ___ will have a large impact on the heart's pumping effectiveness, while large changes in _ do not impact the effectiveness much.

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