Question 1

Coronary artery disease can diminish myocardial blood flow resulting in the death of myocardial cells. This condition is known as a myocardial

Accepted Answer

A)   attack.
B)   angina.
C)   necrosis.
D)   cirrhosis.
E)   infarction.F) A) and C)
G) All of the above

Question 2

The baroreceptor reflex would cause which of the following events to occur if the reflex was caused by an increase in blood pressure?

Accepted Answer

A)   increased parasympathetic stimulation of the heart
B)   increased heart rate
C)   increased cardiac output
D)   increased force of contraction
E)   increased sympathetic stimulation of the heartF) B) and E)
G) B) and D)

Question 3

In the cardiac cycle,

Accepted Answer

A)   the right atrium and the right ventricle contract simultaneously.
B)   the left atrium contracts before the right atrium.
C)   all four chambers of the heart contract at the same time.
D)   all four chambers of the heart are in diastole at the same time.E) None of the above
F) B) and D)

Question 4

All cardiac veins empty into the _________, which then empties into the _______.

Accepted Answer

A)   coronary sinus; left atrium
B)   coronary sinus; right atrium
C)   great cardiac vein; right atrium
D)   great cardiac vein; superior vena cava
E)   inferior vena cava; left atriumF) B) and C)
G) A) and B)

Question 5

Match the structure with the appropriate description.
-bicuspid valve

Accepted Answer

A)  located between the right atrium and the right ventricle
B)  has only two valve flaps
C)  located at the opening to the aorta
D)  a depression in the atrial septum
E)  ridges and columns on the interior walls of ventriclesF) A) and E)
G) A) and D)

Question 6

Energy for contraction of myocardial cells comes primarily from

Accepted Answer

A)   aerobic respiration in the mitochondria.
B)   anaerobic respiration in the cytosol.
C)   glycolysis in the cytosol.
D)   ATP that is stored while the heart is not contracting.
E)   creatine phosphate.F) B) and C)
G) C) and D)

Question 7

Blood in the superior vena cava will enter the _____.

Accepted Answer

A)   aorta
B)   right atrium
C)   pulmonary trunk
D)   pulmonary arteries
E)   pulmonary veinsF) B) and D)
G) B) and C)

Question 8

Which of the following phrases would apply to cardiac muscle cells?

Accepted Answer

A)   are organized in parallel columns or bundles
B)   contain actin but no myosin
C)   develop a significant oxygen debt during systole
D)   are multinucleated like skeletal muscle cells
E)   possess special cell-to-cell contacts called intercalated discsF) B) and D)
G) All of the above

Question 9

-The figure illustrates the cardiac action potential. What does "B" represent?

Accepted Answer

A)   early repolarization phase
B)   plateau phase
C)   final repolarization phase
D)   depolarization phaseE) C) and D)
F) All of the above

Question 10

Which of these statements is true?

Accepted Answer

A)   The left coronary artery is a branch of the left pulmonary vein.
B)   The coronary sinus returns blood to the left atrium.
C)   The coronary arteries arise from the pulmonary trunk.
D)   The great cardiac vein collects blood from the left anterior surface of the heart.
E)   The pulmonary arteries carry blood to the left atrium.F) C) and D)
G) A) and D)

Question 11

Which of the following is a function of the heart skeleton?

Accepted Answer

A)   Provides electrical insulation between the atria and ventricles.
B)   Supplies support and reinforcement for the valves.
C)   Provides a rigid site for cardiac muscle attachment.
D)   All of the choices are functions of the heart skeleton.E) A) and B)
F) B) and D)

Question 12

Match the structure with the appropriate description.
-trabeculae carneae

Accepted Answer

A)  located between the right atrium and the right ventricle
B)  has only two valve flaps
C)  located at the opening to the aorta
D)  a depression in the atrial septum
E)  ridges and columns on the interior walls of ventriclesF) A) and B)
G) D) and E)

Question 13

Match the drug with its effects.
-nitroglycerin

Accepted Answer

A)  binds to epinephrine receptors
B)  prevents clot formation
C)  can reduce calcium diffusion rate into myocardial cells
D)  frequently given to people with restricted coronary blood flow in order to reduce preload
E)  used to treat high blood pressureF) A) and B)
G) All of the above

Question 14

As soon as left ventricular pressure exceeds the pressure in the aorta, the

Accepted Answer

A)   AV valves open.
B)   aortic semilunar valve opens.
C)   atria pump blood into the ventricles.
D)   ventricles pump blood into the atria.
E)   pulmonary semilunar valve closes.F) A) and B)
G) All of the above

Question 15

Chemoreceptors sensitive to blood carbon dioxide levels are primarily located in the

Accepted Answer

A)   medulla oblongata.
B)   carotid arteries.
C)   right atrium.
D)   left ventricle.
E)   jugular veins.F) A) and E)
G) D) and E)

Question 16

Concerning heart sounds, which of the following is correct?

Accepted Answer

A)   The first heart sound occurs at the beginning of ventricular systole.
B)   The second heart sound is heard when the AV valves are closing.
C)   The first heart sound is the sound of the semilunar valves closing.
D)   The second heart sound occurs when blood flows into the superior vena cava.
E)   The first heart sound occurs at the beginning of ventricular diastole.F) B) and E)
G) A) and C)

Question 17

-This chamber pumps to the coronary circuit.

Accepted Answer

The answer of 
-This chamber pumps to the coronary circuit....

Question 18

The AV valve that is located on the same side of the heart as the origin of the aorta is the

Accepted Answer

A)   bicuspid or mitral valve.
B)   tricuspid valve.
C)   aortic semilunar valve.
D)   pulmonary semilunar valve.
E)   coronary sinus valve.F) None of the above
G) A) and E)

Question 19

The first and second heart sounds are most directly related to

Accepted Answer

A)   pulse pressure in the aorta.
B)   the contraction of the atria.
C)   vibrations that occur when the valves close.
D)   contraction of the papillary muscles.
E)   the flow of the blood.F) B) and D)
G) B) and C)

Question 20

Use the following key to mark the most correct answer.
-(1)  thickness of the right ventricular wall;
(2)  thickness of the left ventricular wall

Accepted Answer

A)  Choose A if the first item is greater than the second item.
B)  Choose B if the first item is less than the second item.
C)  Choose C if the first item is equal or nearly equal to the second item.D) None of the above
E) B) and C)

Exam 20: Cardiovascular System: the Heart

Coronary artery disease can diminish myocardial blood flow resulting in the death of myocardial cells. This condition is known as a myocardial

Correct AnswerverifiedShow Answer

Blood in the superior vena cava will enter the _____.

Correct AnswerverifiedShow Answer

Which of these statements is true?

Correct AnswerverifiedShow Answer

In the cardiac cycle,

Correct AnswerverifiedShow Answer

As soon as left ventricular pressure exceeds the pressure in the aorta, the

Correct AnswerverifiedShow Answer

The baroreceptor reflex would cause which of the following events to occur if the reflex was caused by an increase in blood pressure?

Correct AnswerverifiedShow Answer

Match the drug with its effects. -nitroglycerin

Correct AnswerverifiedShow Answer

-The figure illustrates the cardiac action potential. What does "B" represent?

Correct AnswerverifiedShow Answer

Concerning heart sounds, which of the following is correct?

Correct AnswerverifiedShow Answer

Which of the following is a function of the heart skeleton?

Correct AnswerverifiedShow Answer

-This chamber pumps to the coronary circuit.

Correct AnswerverifiedShow Answer

All cardiac veins empty into the _________, which then empties into the _______.

Correct AnswerverifiedShow Answer

The AV valve that is located on the same side of the heart as the origin of the aorta is the

Correct AnswerverifiedShow Answer

Match the structure with the appropriate description. -bicuspid valve

Correct AnswerverifiedShow Answer

Energy for contraction of myocardial cells comes primarily from

Correct AnswerverifiedShow Answer

The first and second heart sounds are most directly related to

Correct AnswerverifiedShow Answer

Match the structure with the appropriate description. -trabeculae carneae

Correct AnswerverifiedShow Answer

Use the following key to mark the most correct answer. -(1) thickness of the right ventricular wall; (2) thickness of the left ventricular wall

Correct AnswerverifiedShow Answer

Which of the following phrases would apply to cardiac muscle cells?

Correct AnswerverifiedShow Answer

Chemoreceptors sensitive to blood carbon dioxide levels are primarily located in the

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

All cardiac veins empty into the ___, which then empties into the _.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified