Question 1

The shallow depression seen on the external surface of the heart between the left and right ventricles is called the __________.

Accepted Answer

A)  coronary sinus
B)  interventricular sulcus
C)  interventricular septum
D)  coronary sulcus
E)  left atriumF) B) and E)
G) None of the above

Question 2

If the sinoatrial (SA) node is damaged,the heart will likely beat at __________ bpm.

Accepted Answer

A)  0 to 10
B)  10 to 20
C)  20 to 40
D)  40 to 50
E)  70 to 80F) A) and C)
G) A) and B)

Question 3

Parasympathetic stimulation reduces heart rate.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following is not part of the cardiac conduction system?

Accepted Answer

A)  Sinoatrial (S
A)   node
B)  Tendinous cords
C)  Atrioventricular (AV)  node
D)  Atrioventricular (AV)  bundle (bundle of His) 
E)  Purkinje fibersF) C) and D)
G) C) and E)

Question 5

The pulmonary circuit is supplied by both the right and the left sides of the heart.

Accepted Answer

A) True 
 B)False

Question 6

Cells of the sinoatrial node __________ during the pacemaker potential.

Accepted Answer

A)  depolarize fast
B)  depolarize slow
C)  repolarize slow
D)  repolarize fast
E)  depolarize slow and repolarize fastF) C) and E)
G) All of the above

Question 7

The heart is located in the space called the __________.

Accepted Answer

A)  pericardial cavity
B)  mediastinum
C)  abdominal cavity
D)  pleural cavity
E)  myocardiumF) B) and D)
G) C) and D)

Question 8

When the left ventricle contracts,the __________ valve closes and the __________ valve is pushed open.

Accepted Answer

A)  mitral; pulmonary
B)  right AV; pulmonary
C)  right AV; aortic
D)  mitral; aortic
E)  aortic; pulmonaryF) A) and B)
G) C) and D)

Question 9

Atrial systole begins __________.

Accepted Answer

A)  immediately before the P wave
B)  immediately after the P wave
C)  during the Q wave
D)  during the S-T segment
E)  immediately after the T waveF) A) and C)
G) A) and B)

Question 10

Which of the following belong to the pulmonary circuit?

Accepted Answer

A)  Aorta and venae cavae
B)  Aorta and pulmonary veins
C)  Pulmonary arteries and venae cavae
D)  Venae cavae and pulmonary veins
E)  Pulmonary arteries and pulmonary veinsF) A) and C)
G) A) and D)

Question 11

If two QRS complexes occur before a P wave it means the __________.

Accepted Answer

A)  atria are contracting too quickly
B)  SA node is not functioning at all
C)  the heart is in ventricular fibrillation
D)  the ventricles have contracted prematurely
E)  the AV node is not functioningF) C) and D)
G) A) and B)

Question 12

Endurance athletes commonly have a resting heart rate as low as 40 bpm,and a stroke volume as low as 50 mL/beat.

Accepted Answer

A) True 
 B)False

Question 13

Opening and closing of the heart valves is caused by _________.

Accepted Answer

A)  breathing
B)  gravity
C)  valves contracting and relaxing
D)  osmotic gradients
E)  pressure gradientsF) All of the above
G) A) and C) E

Question 14

Desmosomes form channels that allow each cardiocyte to electrically stimulate its neighbors.

Accepted Answer

A) True 
 B)False

Question 15

Any abnormal cardiac rhythm is called a(n) __________.

Accepted Answer

A)  ectopic focus
B)  sinus rhythm
C)  nodal rhythm
D)  heart block
E)  arrhythmiaF) A) and D)
G) A) and C) E

Question 16

Hypercapnia and acidosis have positive chronotropic effects.

Accepted Answer

A) True 
 B)False

Question 17

Assume that the left ventricle of a child's heart has an EDV=90mL,and ESV=60mL,and a cardiac output of 2,400 mL/min.His SV is __________ mL/beat and his HR is __________ bpm.

Accepted Answer

A)  30; 80
B)  40; 60
C)  80; 30
D)  150; 16
E)  16; 150F) A) and B)
G) B) and D)

Question 18

Which of the following blood vessels receives blood directly from the right ventricle?

Accepted Answer

A)  Pulmonary trunk
B)  Ascending aorta
C)  Superior vena cava
D)  Inferior vena cava
E)  Right pulmonary veinF) A) and B)
G) A) and E)

Question 19

Which of the following is a feature shared by cardiac muscle and skeletal muscle?

Accepted Answer

A)  Muscle fiber striations
B)  Dependence upon nervous stimulation
C)  Communication via electrical (gap)  junctions
D)  Intercalated discs
E)  AutorhythmicityF) A) and B)
G) C) and D) A

Question 20

The __________ performs the work of the heart.

Accepted Answer

A)  fibrous skeleton
B)  pericardial cavity
C)  endocardium
D)  myocardium
E)  epicardiumF) All of the above
G) D) and E)

Exam 19: The Circulatory System: Heart

The shallow depression seen on the external surface of the heart between the left and right ventricles is called the __________.

Correct AnswerverifiedShow Answer

If the sinoatrial (SA) node is damaged,the heart will likely beat at __________ bpm.

Correct AnswerverifiedShow Answer

Parasympathetic stimulation reduces heart rate.

Correct AnswerverifiedShow Answer

Which of the following is not part of the cardiac conduction system?

Correct AnswerverifiedShow Answer

The pulmonary circuit is supplied by both the right and the left sides of the heart.

Correct AnswerverifiedShow Answer

Cells of the sinoatrial node __________ during the pacemaker potential.

Correct AnswerverifiedShow Answer

The heart is located in the space called the __________.

Correct AnswerverifiedShow Answer

When the left ventricle contracts,the __________ valve closes and the __________ valve is pushed open.

Correct AnswerverifiedShow Answer

Atrial systole begins __________.

Correct AnswerverifiedShow Answer

Which of the following belong to the pulmonary circuit?

Correct AnswerverifiedShow Answer

If two QRS complexes occur before a P wave it means the __________.

Correct AnswerverifiedShow Answer

Endurance athletes commonly have a resting heart rate as low as 40 bpm,and a stroke volume as low as 50 mL/beat.

Correct AnswerverifiedShow Answer

Opening and closing of the heart valves is caused by _________.

Correct AnswerverifiedE

Desmosomes form channels that allow each cardiocyte to electrically stimulate its neighbors.

Correct AnswerverifiedShow Answer

Any abnormal cardiac rhythm is called a(n) __________.

Correct AnswerverifiedE

Hypercapnia and acidosis have positive chronotropic effects.

Correct AnswerverifiedShow Answer

Assume that the left ventricle of a child's heart has an EDV=90mL,and ESV=60mL,and a cardiac output of 2,400 mL/min.His SV is __________ mL/beat and his HR is __________ bpm.

Correct AnswerverifiedShow Answer

Which of the following blood vessels receives blood directly from the right ventricle?

Correct AnswerverifiedShow Answer

Which of the following is a feature shared by cardiac muscle and skeletal muscle?

Correct AnswerverifiedA

The __________ performs the work of the heart.

Correct AnswerverifiedShow Answer

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When the left ventricle contracts,the valve closes and the valve is pushed open.

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E

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E

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Assume that the left ventricle of a child's heart has an EDV=90mL,and ESV=60mL,and a cardiac output of 2,400 mL/min.His SV is mL/beat and his HR is bpm.

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A

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