Question 1

The pacemaker potential is a result of _________.

Accepted Answer

A)   Na+ inflow
B)   Na+ outflow
C)   K+ inflow
D)   K+ outflow
E)   Ca2+ inflowF) B) and E)
G) B) and C)

Question 2

Which is the correct sequence of events of the cardiac cycle?

Accepted Answer

A)   Ventricular filling → isovolumetric contraction → isovolumetric relaxation → ventricular ejection
B)   Ventricular filling → isovolumetric relaxation → isovolumetric contraction → ventricular ejection
C)   Ventricular filling → ventricular ejection → isovolumetric contraction → isovolumetric relaxation
D)   Ventricular filling → isovolumetric relaxation → ventricular ejection → isovolumetric contraction
E)   Ventricular filling → isovolumetric contraction → ventricular ejection → isovolumetric relaxationF) A) and C)
G) D) and E)

Question 3

Cells of the sinoatrial node __________ during the pacemaker potential.

Accepted Answer

A)   depolarize fast
B)   depolarize slow
C)   repolarize slow
D)   repolarize fast
E)   depolarize slow and repolarize fastF) A) and D)
G) A) and E)

Question 4

The area where the major vessels lead to and from the heart's chambers is called the __________ of the heart.The pointy,inferior portion is called the ___________.

Accepted Answer

A)   apex;base
B)   atrium;ventricle
C)   ventricle;atrium
D)   base;apex
E)   endocardium;epicardiumF) A) and B)
G) A) and C)

Question 5

Which of the following belong to the pulmonary circuit?

Accepted Answer

A)   Aorta and venae cavae
B)   Aorta and pulmonary veins
C)   Pulmonary arteries and venae cavae
D)   Venae cavae and pulmonary veins
E)   Pulmonary arteries and pulmonary veinsF) B) and E)
G) B) and C)

Question 6

Electrical signals pass between cardiomyocytes through the _____.

Accepted Answer

A)   gap junctions
B)   desmosomes
C)   tight junctions
D)   hemidesmosomesE) None of the above
F) A) and D)

Question 7

The chordae tendinae of the AV valves are anchored to the __________ of the ventricles.

Accepted Answer

A)   papillary muscles
B)   pectinate muscles
C)   trabeculae carnae
D)   interventricular septum
E)   interatrial septumF) A) and C)
G) B) and E)

Question 8

Mitral valve prolapse (MVP) generates a murmur associated with the __________ heart sound that occurs when the __________.

Accepted Answer

A)   lubb (S1) ;atria contract
B)   dupp (S2) ;atria relax
C)   lubb (S1) ;ventricles contract
D)   dupp (S2) ;ventricles relax
E)   lubb (S1) ;ventricles relaxF) A) and D)
G) All of the above

Question 9

The right atrioventricular valve (tricuspid) regulates the opening between the _________ and the _________.

Accepted Answer

A)   right atrium;left atrium
B)   right atrium;right ventricle
C)   right atrium;left ventricle
D)   left atrium;left ventricle
E)   left ventricle;right ventricleF) None of the above
G) A) and C)

Question 10

Congestive heart failure (CHF) of the right ventricle __________.

Accepted Answer

A)   can cause pulmonary edema
B)   can cause systemic edema
C)   increases the ejection fraction of the right ventricle
D)   reduces the ejection fraction of the left ventricle
E)   increases cardiac output in both ventriclesF) A) and E)
G) B) and D)

Question 11

The __________ performs the work of the heart.

Accepted Answer

A)   fibrous skeleton
B)   pericardial cavity
C)   endocardium
D)   myocardium
E)   epicardiumF) A) and B)
G) A) and C)

Question 12

When the left ventricle contracts,the __________ valve closes and the __________ valve is pushed open.

Accepted Answer

A)   mitral;pulmonary
B)   right AV;pulmonary
C)   right AV;aortic
D)   mitral;aortic
E)   aortic;pulmonaryF) None of the above
G) D) and E)

Question 13

The pulmonary circuit is supplied by both the right and the left sides of the heart.

Accepted Answer

A) True 
 B)False

Question 14

When sodium channels are fully open,the membrane of the ventricular cardiomyocyte _________.

Accepted Answer

A)   sharply hyperpolarizes
B)   sharply repolarizes
C)   sharply depolarizes
D)   plateaus
E)   has no reponseF) B) and C)
G) B) and E)

Question 15

The apex of the heart is found __________ of the midline of the body.

Accepted Answer

A)   to the right
B)   to the left
C)   in the centerD) B) and C)
E) All of the above

Question 16

Ventricular pressure increases the fastest during ventricular filling.

Accepted Answer

A) True 
 B)False

Question 17

When the aortic semilunar valve closes and blood bounces off of it,it produces the __________ heart sound that is ultimately related to when the __________.

Accepted Answer

A)   lubb (S1) ;atria contract
B)   dupp (S2) ;atria relax
C)   lubb (S1) ;ventricles contract
D)   dupp (S2) ;ventricles relax
E)   lubb (S1) ;ventricles relaxF) A) and E)
G) C) and D)

Question 18

Mitral valve prolapse causes blood to leak back into the __________ when the ventricles contract.

Accepted Answer

A)   left atrium
B)   right atrium
C)   aorta
D)   pulmonary trunk
E)   pulmonary arteriesF) A) and B)
G) B) and C)

Question 19

The ventricles are the thicker more powerful chambers of the heart.They pump blood to the lungs and body.

Accepted Answer

A) True 
 B)False

Question 20

Opening and closing of the heart valves is caused by _________.

Accepted Answer

A)   breathing
B)   gravity
C)   valves contracting and relaxing
D)   osmotic gradients
E)   pressure gradientsF) None of the above
G) C) and E)

Exam 19: The Circulatory System: Heart

Mitral valve prolapse (MVP) generates a murmur associated with the __________ heart sound that occurs when the __________.

Correct AnswerverifiedShow Answer

Ventricular pressure increases the fastest during ventricular filling.

Correct AnswerverifiedShow Answer

The pacemaker potential is a result of _________.

Correct AnswerverifiedShow Answer

Which is the correct sequence of events of the cardiac cycle?

Correct AnswerverifiedShow Answer

Opening and closing of the heart valves is caused by _________.

Correct AnswerverifiedShow Answer

Which of the following belong to the pulmonary circuit?

Correct AnswerverifiedShow Answer

When the aortic semilunar valve closes and blood bounces off of it,it produces the __________ heart sound that is ultimately related to when the __________.

Correct AnswerverifiedShow Answer

The apex of the heart is found __________ of the midline of the body.

Correct AnswerverifiedShow Answer

Congestive heart failure (CHF) of the right ventricle __________.

Correct AnswerverifiedShow Answer

Electrical signals pass between cardiomyocytes through the _____.

Correct AnswerverifiedShow Answer

The pulmonary circuit is supplied by both the right and the left sides of the heart.

Correct AnswerverifiedShow Answer

Mitral valve prolapse causes blood to leak back into the __________ when the ventricles contract.

Correct AnswerverifiedShow Answer

When sodium channels are fully open,the membrane of the ventricular cardiomyocyte _________.

Correct AnswerverifiedShow Answer

The chordae tendinae of the AV valves are anchored to the __________ of the ventricles.

Correct AnswerverifiedShow Answer

The __________ performs the work of the heart.

Correct AnswerverifiedShow Answer

The ventricles are the thicker more powerful chambers of the heart.They pump blood to the lungs and body.

Correct AnswerverifiedShow Answer

When the left ventricle contracts,the __________ valve closes and the __________ valve is pushed open.

Correct AnswerverifiedShow Answer

The area where the major vessels lead to and from the heart's chambers is called the __________ of the heart.The pointy,inferior portion is called the ___________.

Correct AnswerverifiedShow Answer

Cells of the sinoatrial node __________ during the pacemaker potential.

Correct AnswerverifiedShow Answer

The right atrioventricular valve (tricuspid) regulates the opening between the _________ and the _________.

Correct AnswerverifiedShow Answer

Mitral valve prolapse (MVP) generates a murmur associated with the heart sound that occurs when the .

Correct Answer
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When the aortic semilunar valve closes and blood bounces off of it,it produces the heart sound that is ultimately related to when the .

Correct Answer
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When the left ventricle contracts,the valve closes and the valve is pushed open.

Correct Answer
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The area where the major vessels lead to and from the heart's chambers is called the of the heart.The pointy,inferior portion is called the _.

Correct Answer
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The right atrioventricular valve (tricuspid) regulates the opening between the _ and the _.

Correct Answer
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