Question 1

Veins that return blood to the heart are also referred to as ________ vessels.

Accepted Answer

A)   afferent
B)   mitral
C)   valvular
D)   efferent
E)   pulmonary

Question 2

The maximum rate of contraction in normal cardiac muscle fibers is approximately ________ per minute.

Accepted Answer

A)   80
B)   140
C)   200
D)   250
E)   300+

Question 3

Which statement is correct regarding the heart wall?

Accepted Answer

A)   The endothelium consists of cardiac muscle tissue, blood vessels, and nerves.
B)   The myocardium is comprised of a simple squamous epithelium and an underlying layer of areolar tissue.
C)   The endocardium is the visceral pericardium.
D)   The cardiac muscle tissue forms bands that wrap around the ventricles and spiral into the wall of the atria.
E)   The epicardium is a serous membrane that consists of an exposed epithelium and an underlying layer of areolar tissue.

Question 4

________ permit the exchange of nutrients,dissolved gases,and waste products between the blood and surrounding tissues.

Accepted Answer

A)   Veins
B)   Arteries
C)   Arterial trunks
D)   Capillaries
E)   Vena cavae

Question 5

In which situation would the filling time (duration of ventricular diastole) be the longest?

Accepted Answer

A)   when heart rate is slow
B)   when heart rate is fast
C)   when the force of contraction is decreased
D)   when the difference between the end diastolic volume and the end systolic volume is small
E)   when calcium channel blockers are present

Question 6

The following is a list of vessels and structures that are associated with the heart. 1.right atrium
2) left atrium
3) right ventricle
4) left ventricle
5) vena cavae
6) aorta
7) pulmonary trunk
8) pulmonary veins
What is the correct order for the flow of blood entering from the systemic circulation?

Accepted Answer

A)   1, 2, 7, 8, 3, 4, 6, 5
B)   1, 7, 3, 8, 2, 4, 6, 5
C)   5, 1, 3, 7, 8, 2, 4, 6
D)   5, 3, 1, 7, 8, 4, 2, 6
E)   5, 1, 3, 8, 7, 2, 4, 6

Question 7

According to the Frank-Starling principle,the cardiac output is directly related to (the)

Accepted Answer

A)   size of the ventricle.
B)   heart rate.
C)   venous return.
D)   thickness of the myocardium.
E)   total amount of blood in the cardiovascular system.

Question 8

Explain the significance of the thickness of the left ventricular wall.

Accepted Answer

The thicker wall of the left ventricle a...

Question 9

Figure 12-1 Major Internal Landmarks of the Heart
Use Figure 12-1 to identify the labeled part.
-Label S represents the

Accepted Answer

A)   interventricular septum.
B)   apex.
C)   opening of the coronary sinus.
D)   fossa ovalis.
E)   interatrial septum.

Question 10

If a decline in blood pressure or oxygen concentrations occurs,the cardiac centers then call for a(n)

Accepted Answer

A)   decrease in cardiac output.
B)   decrease in sympathetic motor neuron activity.
C)   decrease in stroke volume.
D)   increase in parasympathetic motor neuron activity.
E)   increase in cardiac output.

Question 11

Which of the following indicates the start of the systemic circuit?

Accepted Answer

A)   pulmonary trunk
B)   pulmonary arteries
C)   vena cavae
D)   ascending aorta
E)   cardiac veins

Question 12

The QRS complex on an ECG tracing represents

Accepted Answer

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

Question 13

Figure 12-1 Major Internal Landmarks of the Heart
Use Figure 12-1 to identify the labeled part.
-Label N represents the

Accepted Answer

A)   trabeculae carneae.
B)   chordae tendineae.
C)   auricle.
D)   papillary muscle.
E)   pectinate muscle.

Question 14

The muscle layer of the heart is the

Accepted Answer

A)   epicardium.
B)   myocardium.
C)   endocardium.
D)   visceral pericardium.
E)   endothelium.

Question 15

Figure 12-1 Major Internal Landmarks of the Heart
Use Figure 12-1 to identify the labeled part.
-Label K represents the

Accepted Answer

A)   aortic arch.
B)   pulmonary trunk.
C)   descending aorta.
D)   superior vena cava.
E)   inferior vena cava.

Question 16

A faster-than-normal heart rate is called

Accepted Answer

A)   bradycardia.
B)   tachycardia.
C)   tetanus.
D)   myocardial infarct.
E)   arrhythmia.

Question 17

Cardiac muscle cells have abundant reserves of myoglobin,which function in

Accepted Answer

A)   removing waste products.
B)   storing iron.
C)   removing carbon dioxide.
D)   storing oxygen.
E)   the shortening of individual sarcomeres.

Question 18

The semilunar valves prevent backflow into the

Accepted Answer

A)   atria.
B)   aorta.
C)   ventricles.
D)   pulmonary trunk.
E)   venae cavae.

Question 19

During repolarization,________ ions rush out of the ventricular contractile cell.

Accepted Answer

A)   sodium
B)   calcium
C)   magnesium
D)   selenium
E)   potassium

Question 20

The pulmonary arteries carry blood to the

Accepted Answer

A)   heart.
B)   lungs.
C)   brain.
D)   kidneys.
E)   pancreas.

Exam 12: The Cardiovascular System: The Heart

In which situation would the filling time (duration of ventricular diastole) be the longest?

Correct Answer
verified

According to the Frank-Starling principle,the cardiac output is directly related to (the)

Correct Answer
verified

A faster-than-normal heart rate is called

Correct Answer
verified

________ permit the exchange of nutrients,dissolved gases,and waste products between the blood and surrounding tissues.

Correct Answer
verified

Which of the following indicates the start of the systemic circuit?

Correct Answer
verified

Cardiac muscle cells have abundant reserves of myoglobin,which function in

Correct Answer
verified

If a decline in blood pressure or oxygen concentrations occurs,the cardiac centers then call for a(n)

Correct Answer
verified

Explain the significance of the thickness of the left ventricular wall.

Correct Answer
verified
The thicker wall of the left ventricle a...
View Answer

The QRS complex on an ECG tracing represents

Correct Answer
verified

The muscle layer of the heart is the

Correct Answer
verified

Veins that return blood to the heart are also referred to as ________ vessels.

Correct Answer
verified

During repolarization,________ ions rush out of the ventricular contractile cell.

Correct Answer
verified

The maximum rate of contraction in normal cardiac muscle fibers is approximately ________ per minute.

Correct Answer
verified

Figure 12-1 Major Internal Landmarks of the Heart Use Figure 12-1 to identify the labeled part. -Label N represents the

Correct Answer
verified

Figure 12-1 Major Internal Landmarks of the Heart Use Figure 12-1 to identify the labeled part. -Label K represents the

Correct Answer
verified

The pulmonary arteries carry blood to the

Correct Answer
verified

Correct Answer
verified

Figure 12-1 Major Internal Landmarks of the Heart Use Figure 12-1 to identify the labeled part. -Label S represents the

Correct Answer
verified

Which statement is correct regarding the heart wall?

Correct Answer
verified

The semilunar valves prevent backflow into the

Correct Answer
verified

Exam 12: The Cardiovascular System: The Heart

In which situation would the filling time (duration of ventricular diastole) be the longest?

Correct AnswerverifiedShow Answer

According to the Frank-Starling principle,the cardiac output is directly related to (the)

Correct AnswerverifiedShow Answer

A faster-than-normal heart rate is called

Correct AnswerverifiedShow Answer

________ permit the exchange of nutrients,dissolved gases,and waste products between the blood and surrounding tissues.

Correct AnswerverifiedShow Answer

Which of the following indicates the start of the systemic circuit?

Correct AnswerverifiedShow Answer

Cardiac muscle cells have abundant reserves of myoglobin,which function in

Correct AnswerverifiedShow Answer

If a decline in blood pressure or oxygen concentrations occurs,the cardiac centers then call for a(n)

Correct AnswerverifiedShow Answer

Explain the significance of the thickness of the left ventricular wall.

Correct AnswerverifiedThe thicker wall of the left ventricle a...View AnswerShow Answer

The QRS complex on an ECG tracing represents

Correct AnswerverifiedShow Answer

The muscle layer of the heart is the

Correct AnswerverifiedShow Answer

Veins that return blood to the heart are also referred to as ________ vessels.

Correct AnswerverifiedShow Answer

During repolarization,________ ions rush out of the ventricular contractile cell.

Correct AnswerverifiedShow Answer

The maximum rate of contraction in normal cardiac muscle fibers is approximately ________ per minute.

Correct AnswerverifiedShow Answer

Figure 12-1 Major Internal Landmarks of the Heart Use Figure 12-1 to identify the labeled part. -Label N represents the

Correct AnswerverifiedShow Answer

Figure 12-1 Major Internal Landmarks of the Heart Use Figure 12-1 to identify the labeled part. -Label K represents the

Correct AnswerverifiedShow Answer

The pulmonary arteries carry blood to the

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Figure 12-1 Major Internal Landmarks of the Heart Use Figure 12-1 to identify the labeled part. -Label S represents the

Correct AnswerverifiedShow Answer

Which statement is correct regarding the heart wall?

Correct AnswerverifiedShow Answer

The semilunar valves prevent backflow into the

Correct AnswerverifiedShow Answer

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verified
The thicker wall of the left ventricle a...
View Answer

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verified

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Correct Answer
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Correct Answer
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Correct Answer
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