Question 1

The heart valves

Accepted Answer

A)   stabilize and hold the arteries leaving the heart.
B)   permit the passage of blood in one direction.
C)   separate the right and left sides of the heart.
D)   are only used in the fetal heart.
E)   direct the conduction impulse through the heart muscle.F) A) and D)
G) C) and D)

Question 2

The function of the coronary sinus is to

Accepted Answer

A)   connect the top and bottom halves of the heart.
B)   guide the aorta out of the heart.
C)   guide the inferior vena cava into the right atrium.
D)   take blood from the coronary circulation to the right atrium.
E)   shunt blood from the right atrium to the left atrium.F) A) and B)
G) None of the above

Question 3

Preload is the stretch of the heart wall as determined by the amount of blood returned by the veins.

Accepted Answer

A) True 
 B)False

Question 4

Cardiac output equals the

Accepted Answer

A)   end diastolic volume minus end systolic volume.
B)   blood pressure multiplied by heart rate.
C)   heart rate multiplied by stroke volume.
D)   stroke volume divided by heart rate.
E)   cardiac reserve minus the stroke volume.F) A) and B)
G) A) and C)

Question 5

What are the cell-to-cell contacts of the cardiac muscle fibers called?

Accepted Answer

A)   Z discs
B)   T-tubules
C)   Intercalated discs
D)   Cardiac discs
E)   Sarcoplasmic reticulumF) None of the above
G) B) and D)

Question 6

It is the contraction of the atria during atrial systole that completes the filling of the ventricles while the ventricles are in diastole.

Accepted Answer

A) True 
 B)False

Question 7

The resistance in arteries to the ejection of blood by the heart is known as ________.

Accepted Answer

The answer of The resistance in arteries to the ejection...

Question 8

The term used to describe the inadequate blood flow to a structure caused by obstruction of the blood supply is ________.

Accepted Answer

The answer of The term used to describe the inadequate...

Question 9

Cardiac output is the amount of blood that is pumped

Accepted Answer

A)   by a single ventricle in one hour.
B)   by a single ventricle in one minute.
C)   by both ventricles in one hour.
D)   by both ventricles in one minute.
E)   by the left ventricle into the aorta in one beat.F) C) and E)
G) A) and D)

Question 10

The atrioventricular (AV)  node is located in the

Accepted Answer

A)   floor of the left atrium.
B)   floor of the right atrium.
C)   roof of the left ventricle.
D)   back wall of the right ventricle.
E)   back wall of the left ventricle.F) A) and E)
G) All of the above

Question 11

The papillary muscles attach to the cusps of the atrioventricular valves by means of the

Accepted Answer

A)   pectinate muscles.
B)   trabeculae carneae.
C)   conus arteriosus.
D)   tendinous cords.
E)   tricuspid valve.F) C) and D)
G) A) and B)

Question 12

The right border of the heart is supplied by the

Accepted Answer

A)   circumflex artery.
B)   posterior interventricular artery.
C)   anterior interventricular artery.
D)   right marginal artery.
E)   great cardiac vein.F) All of the above
G) C) and D)

Question 13

Though the autonomic innervation by autonomic centers in the brainstem cannot initiate a heartbeat, it can increase or decrease the heart rate.

Accepted Answer

A) True 
 B)False

Question 14

Which heart chambers contain deoxygenated blood?

Accepted Answer

A)   Left atrium and right atrium
B)   Left ventricle and right ventricle
C)   Right atrium and right ventricle
D)   Left atrium and left ventricle
E)   Right atrium and left ventricleF) B) and C)
G) A) and C)

Question 15

Vagal tone refers to the

Accepted Answer

A)   decreasing of the heart rate below its inherent rhythm by parasympathetic stimulation.
B)   decreasing of the heart rate below its inherent rhythm by sympathetic stimulation.
C)   increasing of the heart rate above its inherent rhythm by sympathetic stimulation.
D)   increasing of the heart rate above its inherent rhythm by parasympathetic stimulation.E) All of the above
F) C) and D)

Question 16

Which of the following is not one of the three main factors influencing stroke volume?

Accepted Answer

A)   Afterload
B)   Chronotropic agents
C)   Inotropic agents
D)   Venous returnE) A) and C)
F) B) and C)

Question 17

Predictions related to homeostatic imbalance, including disease states & disorders. 
-In this figure showing an anterior view of the heart, what is depicted by number 7?

Accepted Answer

A)   Aortic semilunar valve
B)   Right atrium
C)   Left ventricle
D)   Right atrioventricular valve
E)   Pulmonary semilunar valveF) C) and D)
G) B) and C)

Question 18

Cardiac reserve is greater in a nonathletic individual than in a highly trained athlete.

Accepted Answer

A) True 
 B)False

Question 19

The plateau phase of an action potential

Accepted Answer

A)   occurs only in skeletal muscle and makes those fibers' contractions most forceful.
B)   leads to tetanic contractions in smooth and skeletal muscle.
C)   allows cardiac muscle cells to contract and then relax without locking up.
D)   allows cardiac muscle cells to exhibit synchronous fibrillation.E) None of the above
F) All of the above

Question 20

From which view is the connection between the pulmonary veins and the heart most visible?

Accepted Answer

A)   Anterior view
B)   Posterior viewC) A) and B)
D) undefined

Exam 19: Cardiovascular System: Heart

The function of the coronary sinus is to

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The resistance in arteries to the ejection of blood by the heart is known as ________.

Correct AnswerverifiedShow Answer

Cardiac output is the amount of blood that is pumped

Correct AnswerverifiedShow Answer

From which view is the connection between the pulmonary veins and the heart most visible?

Correct AnswerverifiedShow Answer

Predictions related to homeostatic imbalance, including disease states & disorders. -In this figure showing an anterior view of the heart, what is depicted by number 7?

Correct AnswerverifiedShow Answer

Though the autonomic innervation by autonomic centers in the brainstem cannot initiate a heartbeat, it can increase or decrease the heart rate.

Correct AnswerverifiedShow Answer

The term used to describe the inadequate blood flow to a structure caused by obstruction of the blood supply is ________.

Correct AnswerverifiedShow Answer

Vagal tone refers to the

Correct AnswerverifiedShow Answer

Preload is the stretch of the heart wall as determined by the amount of blood returned by the veins.

Correct AnswerverifiedShow Answer

Cardiac output equals the

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Which heart chambers contain deoxygenated blood?

Correct AnswerverifiedShow Answer

Cardiac reserve is greater in a nonathletic individual than in a highly trained athlete.

Correct AnswerverifiedShow Answer

The heart valves

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The plateau phase of an action potential

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What are the cell-to-cell contacts of the cardiac muscle fibers called?

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The right border of the heart is supplied by the

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The papillary muscles attach to the cusps of the atrioventricular valves by means of the

Correct AnswerverifiedShow Answer

Which of the following is not one of the three main factors influencing stroke volume?

Correct AnswerverifiedShow Answer

The atrioventricular (AV) node is located in the

Correct AnswerverifiedShow Answer

It is the contraction of the atria during atrial systole that completes the filling of the ventricles while the ventricles are in diastole.

Correct AnswerverifiedShow Answer

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