Question 1

The source of blood carried to capillaries in the myocardium would be the ________.

Accepted Answer

A)   coronary sinus
B)   fossa ovalis
C)   coronary arteries
D)   coronary veinsE) C) and D)
F) A) and B)

Question 2

A patient is prescribed a calcium channel blocker to prevent angina (chest pain), by decreasing the demand for oxygen. Explain why.

Accepted Answer

By preventing the influx of calcium ions...

Question 3

A)

B)

C)

D)

Figure 17.3
Using Figure 17.3, match the following:
-Second-degree heart block.

Accepted Answer

The answer of A)

B)

C)

D)

Figure 17.3
Using Figure 17.3, match the...

Question 4

Figure 17.4
Using Figure 17.4, match the following:
-Right atrium.

Accepted Answer

The answer of  
Figure 17.4
Using Figure 17.4, match the...

Question 5

Cardiac muscle has more mitochondria and depends less on a continual supply of oxygen than does skeletal muscle.

Accepted Answer

A) True 
 B)False

Question 6

During contraction of heart muscle cells ________.

Accepted Answer

A)   the action potential is initiated by voltage-gated slow calcium channels
B)   some calcium enters the cell from the extracellular space and triggers the release of larger amounts of calcium from intracellular stores
C)   the action potential is prevented from spreading from cell to cell by gap junctions
D)   calcium is prevented from entering cardiac fibers that have been stimulatedE) B) and D)
F) All of the above

Question 7

Match the following:
A) Endocardium
B) Myocardium
C) Epicardium
D) Parietal layer
-Heart muscle.

Accepted Answer

The answer of Match the following:
A) Endocardium
B) Myocardium
C) Epicardium
D) Parietal...

Question 8

An ECG provides direct information about valve function.

Accepted Answer

A) True 
 B)False

Question 9

If we were able to artificially alter the membrane permeability of pacemaker cells so that sodium influx is more rapid, ________.

Accepted Answer

A)   threshold is reached more quickly and heart rate would increase
B)   potassium channels compensate and no change in heart rate would occur
C)   heart rate would decrease, but blood pressure would rise due to the excess sodium present
D)   tetanic contraction would occur due to the short absolute refractory period of cardiac muscleE) A) and B)
F) A) and C)

Question 10

A)

B)

C)

D)

Figure 17.3
Using Figure 17.3, match the following:
-Junctional rhythm.

Accepted Answer

The answer of A)

B)

C)

D)

Figure 17.3
Using Figure 17.3, match the...

Question 11

Norepinephrine acts on the heart by ________.

Accepted Answer

A)   decreasing heart contractility
B)   causing a decrease in stroke volume
C)   blocking the action of calcium
D)   causing threshold to be reached more quicklyE) A) and B)
F) None of the above

Question 12

Which vessel(s)  of the heart receive(s)  blood during right ventricular systole?

Accepted Answer

A)   venae cavae
B)   pulmonary trunk
C)   aorta
D)   pulmonary veinsE) None of the above
F) B) and D)

Question 13

Figure 17.4
Using Figure 17.4, match the following:
-Pulmonary veins.

Accepted Answer

The answer of  
Figure 17.4
Using Figure 17.4, match the...

Question 14

Figure 17.2
Using Figure 17.2, match the following:
-Point after which pressure begins to rise in the aorta.

Accepted Answer

The answer of  
Figure 17.2
Using Figure 17.2, match the...

Question 15

Which of these vessels receives blood during ventricular systole?

Accepted Answer

A)   aorta only
B)   pulmonary arteries only
C)   pulmonary veins only
D)   both the aorta and pulmonary trunkE) A) and B)
F) B) and C)

Question 16

The "lub" sounds of the heart are valuable in diagnosis because they provide information about the function of the heart's pulmonary and aortic valves.

Accepted Answer

A) True 
 B)False

Question 17

Match the following:
A) Quiescent period
B) Ischemia
C) Fibrillation
D) Infarction
E) Ectopic focus
-Heart muscle is deprived of oxygen.

Accepted Answer

The answer of Match the following:
A) Quiescent period
B) Ischemia
C) Fibrillation
D)...

Question 18

Arterial blood supply to heart muscle is continuous whether the heart is in systole or diastole.

Accepted Answer

A) True 
 B)False

Question 19

Figure 17.1
Using Figure 17.1, match the following:
-AV bundle.

Accepted Answer

The answer of  
Figure 17.1
Using Figure 17.1, match the...

Question 20

Explain autorhythmicity in cardiac muscle cells.

Accepted Answer

Autorhythmic cells do not maintain a sta...

Exam 17: The Cardiovascular System: the Heart

A) B) C) D) Figure 17.3 Using Figure 17.3, match the following: -Junctional rhythm.

Correct AnswerverifiedShow Answer

An ECG provides direct information about valve function.

Correct AnswerverifiedShow Answer

The "lub" sounds of the heart are valuable in diagnosis because they provide information about the function of the heart's pulmonary and aortic valves.

Correct AnswerverifiedShow Answer

If we were able to artificially alter the membrane permeability of pacemaker cells so that sodium influx is more rapid, ________.

Correct AnswerverifiedShow Answer

Norepinephrine acts on the heart by ________.

Correct AnswerverifiedShow Answer

Figure 17.2 Using Figure 17.2, match the following: -Point after which pressure begins to rise in the aorta.

Correct AnswerverifiedShow Answer

Match the following: A) Endocardium B) Myocardium C) Epicardium D) Parietal layer -Heart muscle.

Correct AnswerverifiedShow Answer

Figure 17.1 Using Figure 17.1, match the following: -AV bundle.

Correct AnswerverifiedShow Answer

Figure 17.4 Using Figure 17.4, match the following: -Pulmonary veins.

Correct AnswerverifiedShow Answer

Figure 17.4 Using Figure 17.4, match the following: -Right atrium.

Correct AnswerverifiedShow Answer

Arterial blood supply to heart muscle is continuous whether the heart is in systole or diastole.

Correct AnswerverifiedShow Answer

The source of blood carried to capillaries in the myocardium would be the ________.

Correct AnswerverifiedShow Answer

Which vessel(s) of the heart receive(s) blood during right ventricular systole?

Correct AnswerverifiedShow Answer

Explain autorhythmicity in cardiac muscle cells.

Correct AnswerverifiedAutorhythmic cells do not maintain a sta...View AnswerShow Answer

A patient is prescribed a calcium channel blocker to prevent angina (chest pain), by decreasing the demand for oxygen. Explain why.

Correct AnswerverifiedBy preventing the influx of calcium ions...View AnswerShow Answer

Match the following: A) Quiescent period B) Ischemia C) Fibrillation D) Infarction E) Ectopic focus -Heart muscle is deprived of oxygen.

Correct AnswerverifiedShow Answer

During contraction of heart muscle cells ________.

Correct AnswerverifiedShow Answer

Which of these vessels receives blood during ventricular systole?

Correct AnswerverifiedShow Answer

Cardiac muscle has more mitochondria and depends less on a continual supply of oxygen than does skeletal muscle.

Correct AnswerverifiedShow Answer

A) B) C) D) Figure 17.3 Using Figure 17.3, match the following: -Second-degree heart block.

Correct AnswerverifiedShow Answer

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Autorhythmic cells do not maintain a sta...
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By preventing the influx of calcium ions...
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