Question 1

The earlike extension of the atrium is the

Accepted Answer

A)  ventricle.
B)  coronary sinus.
C)  coronary sulcus.
D)  auricle.
E)  atricle.

Question 2

The structure that permits blood flow from the right atrium to the left atrium in the fetal circulation is the

Accepted Answer

A)  foramen ovale.
B)  interatrial septum.
C)  coronary sinus.
D)  fossa ovalis.
E)  ligamentum arteriosus.

Question 3

End-systolic volume is defined as the

Accepted Answer

A)  amount of blood a ventricle ejects per cycle.
B)  amount of blood which backflows into a ventricle.
C)  amount of blood remaining in an atrium after atrial systole.
D)  amount of blood remaining in a ventricle after contraction.
E)  stroke volume multiplied by the heart rate.

Question 4

Figure 20-1 The Heart
Use Figure 20-1 to answer the following questions:
-Identify the structure labeled "19."

Accepted Answer

A)  tricuspid valve
B)  pulmonary semilunar valve
C)  aortic semilunar valve
D)  bicuspid valve
E)  ligamentum arteriosum

Question 5

The coronary sinus drains the ________ into the ________.

Accepted Answer

A)  coronary arteries; left ventricle
B)  cardiac veins; right atrium
C)  interventricular artery; left ventricle
D)  right atrium; right ventricle
E)  cardiac vein; right ventricle

Question 6

The ________ is the amount of blood in a ventricle after it has contracted and before it begins to refill.

Accepted Answer

A)  ejection fraction
B)  end-diastole volume
C)  start-diastolic volume
D)  end-systolic volume
E)  stroke volume

Question 7

The T wave on an ECG tracing represents

Accepted Answer

A)  atrial depolarization.
B)  atrial repolarization.
C)  ventricular depolarization.
D)  ventricular repolarization.
E)  ventricular contraction.

Question 8

Figure 20-2 Cardiac Cycle
Use Figure 20-2 to answer the following questions:
-What occurs at the circled label "4" on the graph?

Accepted Answer

A)  ventricular ejection
B)  sympathetic stimulation
C)  isovolumetric ventricular contraction
D)  isovolumetric ventricular relaxation
E)  ventricular filling

Question 9

The phase in the cardiac cycle when the mitral valve is closed and the aortic valve is open is the

Accepted Answer

A)  atrial systole.
B)  early diastolic filling phase.
C)  late diastolic filling phase.
D)  systolic ejection phase.
E)  dicrotic phase.

Question 10

The principle that increasing the end-diastolic volume results in a corresponding increase in the stroke volume is known as

Accepted Answer

A)  afterload.
B)  cardiac capacity.
C)  cardiac reserve.
D)  Starling's law of the heart.
E)  expandibility.

Question 11

Pericardial fluid

Accepted Answer

A)  provides oxygen to the heart muscle.
B)  is located between the myocardium and the endocardium.
C)  is a lubricant between the heart and the pericardial sac.
D)  consists of plasma that has leaked out of whole blood.
E)  flows through the four chambers of the heart.

Question 12

Each of the following factors will increase cardiac output except increased

Accepted Answer

A)  venous return.
B)  parasympathetic stimulation.
C)  sympathetic stimulation.
D)  heart rate.
E)  force of contraction.

Question 13

If the force of ventricular contraction increases,what will happen to the end-systolic volume?

Accepted Answer

A)  increase
B)  fluctuate rapidly
C)  remain the same
D)  decrease
E)  reduced to zero

Question 14

Figure 20-2 Cardiac Cycle
Use Figure 20-2 to answer the following questions:
-What occurs at "A" on the graph?

Accepted Answer

A)  Semilunar valve opens.
B)  Semilunar valve closes.
C)  AV valve opens.
D)  AV valve closes.
E)  end systolic volume

Question 15

The atrioventricular valves permit blood flow

Accepted Answer

A)  in one direction only.
B)  in both directions.
C)  in many directions.
D)  in opposite directions on the right and left.
E)  from a ventricle to an atrium.

Question 16

Stroke volume depends on

Accepted Answer

A)  end diastolic volume.
B)  the contractility of the ventricle.
C)  the pressure required to pump blood into the aorta.
D)  venous return of blood to the heart.
E)  All of the answers are correct.

Question 17

The inferior point of the heart is called the

Accepted Answer

A)  apex.
B)  hilum.
C)  base.
D)  septum.
E)  mediastinum.

Question 18

The heart beats approximately ________ times each day.

Accepted Answer

A)  1,000
B)  10,000
C)  100,000
D)  1,000,000
E)  10,000,000

Question 19

Excess fluid in the ________ causes cardiac tamponade.

Accepted Answer

A)  pericardial cavity
B)  visceral pericardium
C)  apex of heart
D)  left ventricle
E)  both atria

Question 20

The heart lies within the ________ cavity.

Accepted Answer

A)  peritoneal
B)  pleural
C)  orbital
D)  dorsal
E)  pericardial

Exam 20: The Heart

The heart beats approximately ________ times each day.

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Excess fluid in the ________ causes cardiac tamponade.

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The coronary sinus drains the ________ into the ________.

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The inferior point of the heart is called the

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The T wave on an ECG tracing represents

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The ________ is the amount of blood in a ventricle after it has contracted and before it begins to refill.

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The structure that permits blood flow from the right atrium to the left atrium in the fetal circulation is the

Correct AnswerverifiedShow Answer

The earlike extension of the atrium is the

Correct AnswerverifiedShow Answer

If the force of ventricular contraction increases,what will happen to the end-systolic volume?

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End-systolic volume is defined as the

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Figure 20-1 The Heart Use Figure 20-1 to answer the following questions: -Identify the structure labeled "19."

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The atrioventricular valves permit blood flow

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Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: -What occurs at "A" on the graph?

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Stroke volume depends on

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Pericardial fluid

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The heart lies within the ________ cavity.

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Each of the following factors will increase cardiac output except increased

Correct AnswerverifiedShow Answer

The principle that increasing the end-diastolic volume results in a corresponding increase in the stroke volume is known as

Correct AnswerverifiedShow Answer

The phase in the cardiac cycle when the mitral valve is closed and the aortic valve is open is the

Correct AnswerverifiedShow Answer

Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: -What occurs at the circled label "4" on the graph?

Correct AnswerverifiedShow Answer

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The coronary sinus drains the into the .

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