Question 1

Mercury is used to measure blood pressure because it is __________ compared to other liquids.

Accepted Answer

A)   more dense
B)   less dense
C)   darker in color
D)   lighter in color
E)   warmerF) A) and E)
G) C) and D)

Question 2

Exercise causes the ventricles to hypertrophy.

Accepted Answer

A) True 
 B)False

Question 3

The __________ is the pacemaker that initiates each heart beat.

Accepted Answer

A)   sympathetic division of the nervous system
B)   autonomic nervous system
C)   sinoatrial (S
A)  node
D)   atrioventricular (AV) node
E)   cardiac conduction systemF) A) and C)
G) A) and B)

Question 4

The amount of blood pumped through the pulmonary circuit is less than the amount pumped through the systemic circuit.

Accepted Answer

A) True 
 B)False

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

Papillary muscles prevent the AV valves from prolapsing (bulging)excessively into the atria when the ventricles contract.

Accepted Answer

A) True 
 B)False

Question 7

The long absolute refractory period of cardiomyocytes _________.

Accepted Answer

A)   ensures a short twitch
B)   prevents tetanus
C)   makes the heart prone to arrhythmias
D)   prevents the occurrence of ectopic focuses
E)   causes the pacemaker potentialF) A) and B)
G) A) and C)

Question 8

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 E)
G) C) and E)

Question 9

The fibrous skeleton of the heart serves as electrical insulation between the atria and the ventricles.

Accepted Answer

A) True 
 B)False

Question 10

In a normal ECG,the deflection that is generated by ventricular repolarization is called the __________.

Accepted Answer

A)   R wave
B)   QRS wave
C)   P wave
D)   S wave
E)   T waveF) C) and D)
G) B) and E)

Question 11

Isovolumetric contraction occurs during the __________ of the electrocardiogram.

Accepted Answer

A)   P wave
B)   P-Q segment
C)   R wave
D)   S-T segment
E)   T waveF) A) and B)
G) All of the above

Question 12

Repolarization of a ventricular cardiomyocyte takes longer than repolarization of a typical neuron.

Accepted Answer

A) True 
 B)False

Question 13

The Frank-Starling law of the heart states that stroke volume is proportional to __________.

Accepted Answer

A)   the end-systolic volume
B)   the end-diastolic volume
C)   the afterload
D)   the heart rate
E)   contractilityF) A) and C)
G) A) and B)

Question 14

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 E)
G) C) and D)

Question 15

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) All of the above
G) A) and E)

Question 16

Blood pressure is usually measured in millimeters of mercury (mmHg)but could be measured with any liquid,such as water (mm H20).

Accepted Answer

A) True 
 B)False

Question 17

During isovolumetric contraction,the pressure in the ventricles __________.

Accepted Answer

A)   falls rapidly
B)   rises rapidly
C)   remains constant
D)   rises and then falls
E)   falls and then risesF) C) and D)
G) All of the above

Question 18

Which of the following carry oxygen-poor blood?

Accepted Answer

A)   Pulmonary veins and vena cavae
B)   Aorta and pulmonary veins
C)   Aorta and vena cavae
D)   Venae cavae and pulmonary arteries
E)   Pulmonary veins and pulmonary arteriesF) B) and D)
G) A) and B)

Question 19

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 B)
G) All of the above

Question 20

Atrial hypertrophy would probably cause an enlarged P wave on an electrocardiogram.

Accepted Answer

A) True 
 B)False

Exam 19: The Circulatory System: Heart

The Frank-Starling law of the heart states that stroke volume is proportional to __________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In a normal ECG,the deflection that is generated by ventricular repolarization is called the __________.

Correct AnswerverifiedShow Answer

Mercury is used to measure blood pressure because it is __________ compared to other liquids.

Correct AnswerverifiedShow Answer

Papillary muscles prevent the AV valves from prolapsing (bulging)excessively into the atria when the ventricles contract.

Correct AnswerverifiedShow Answer

Blood pressure is usually measured in millimeters of mercury (mmHg)but could be measured with any liquid,such as water (mm H20).

Correct AnswerverifiedShow Answer

Repolarization of a ventricular cardiomyocyte takes longer than repolarization of a typical neuron.

Correct AnswerverifiedShow Answer

During isovolumetric contraction,the pressure in the ventricles __________.

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

Isovolumetric contraction occurs during the __________ of the electrocardiogram.

Correct AnswerverifiedShow Answer

The amount of blood pumped through the pulmonary circuit is less than the amount pumped through the systemic circuit.

Correct AnswerverifiedShow Answer

The __________ is the pacemaker that initiates each heart beat.

Correct AnswerverifiedShow Answer

The fibrous skeleton of the heart serves as electrical insulation between the atria and the ventricles.

Correct AnswerverifiedShow Answer

The long absolute refractory period of cardiomyocytes _________.

Correct AnswerverifiedShow Answer

Atrial hypertrophy would probably cause an enlarged P wave on an electrocardiogram.

Correct AnswerverifiedShow Answer

Exercise causes the ventricles to hypertrophy.

Correct AnswerverifiedShow Answer

Which of the following carry oxygen-poor blood?

Correct AnswerverifiedShow Answer

Atrial systole begins __________.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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Blood pressure is usually measured in millimeters of mercury (mmHg)but could be measured with any liquid,such as water (mm H₂0).

Correct Answer
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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.

Correct Answer
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