Question 1

If the stroke volume is unequal between the left and right ventricles, ________ may occur, which is excess fluid surrounding or within cells.

Accepted Answer

The answer of If the stroke volume is unequal between...

Question 2

Contrast the length-tension relationship for cardiac muscle to that which is found in skeletal muscle. In other words, for each type of muscle, what is the optimal length? How is such an arrangement adaptive to cardiac muscle?

Accepted Answer

Unlike skeletal muscle, cardiac muscle d...

Question 3

The pericardium helps prevent overfilling of the heart and it lessens the friction of movements during heartbeats.

Accepted Answer

A) True 
 B)False

Question 4

Cardiac output is usually expressed in

Accepted Answer

A)   beats per minute.
B)   mL per beat.
C)   mm Hg.
D)   liters per minute.E) None of the above
F) A) and C)

Question 5

During a cardiac cycle, how many of the four chambers contract at any one time?

Accepted Answer

A)   1
B)   2
C)   4
D)   Highly variable, depending on the heart beat rate
E)   None of the choices is correct.F) All of the above
G) C) and D)

Question 6

For the repolarization phase of an SA nodal cell action potential,

Accepted Answer

A)   sodium and potassium channels open.
B)   calcium channels open and sodium channels close.
C)   calcium and potassium channels close.
D)   calcium channels close and potassium channels open.
E)   sodium and chloride channels open.F) A) and C)
G) C) and E)

Question 7

Sympathetic innervation of the heart
A: increases the heart rate
B: decreases the heart rate
C: increases the force of contractions
D: decreases the force of contractions
E: has no effect on contraction force

Accepted Answer

A)   a, c
B)   b, d
C)   a, d
D)   b, e
E)   a, eF) C) and D)
G) D) and E)

Question 8

Predictions related to homeostatic imbalance, including disease states & disorders. 
-In this figure showing an anterior view of the heart, the left atrium is noted by number

Accepted Answer

A)   1.
B)   2.
C)   3.
D)   4.
E)   5.F) A) and C)
G) C) and D)

Question 9

At the AV node of the conduction system, the action potential is

Accepted Answer

A)   rapidly advanced due to the cells being large and well connected by gap junctions.
B)   rapidly advanced due to the cells being small and well insulated by myelin.
C)   delayed due to the cells being small and having few gap junctions.
D)   delayed due to the cells being large and having many leakage channels.E) A) and C)
F) None of the above

Question 10

Pectinate muscles are found on the

Accepted Answer

A)   posterior wall of the right ventricle.
B)   anterior wall of the right ventricle.
C)   internal walls of the right and left atria.
D)   posterior walls of the right and left ventricles.
E)   external wall of the right atrium.F) C) and E)
G) B) and D)

Question 11

Myofibrils within cardiac muscle cells are aligned in sarcomeres.

Accepted Answer

A) True 
 B)False

Question 12

Which segment of the ECG reflects the plateau phase of ventricular muscle cells' action potentials?

Accepted Answer

A)   P-T segment
B)   S-T segment
C)   Q-R segment
D)   P-R interval
E)   T-P intervalF) All of the above
G) A) and B)

Question 13

The base of the heart faces in the ________ directions.

Accepted Answer

A)   anterior and inferior
B)   anterior and superior
C)   posterior and superior
D)   posterior and inferior
E)   None of these choices is correct.F) A) and E)
G) B) and C)

Question 14

Which circuit of the cardiovascular system includes the left ventricle and aorta?

Accepted Answer

A)   Pulmonary circuit
B)   Cardio circuit
C)   Coronary circuit
D)   Systemic circuitE) None of the above
F) A) and C)

Question 15

Cardiac reserve is

Accepted Answer

A)   the potential increase in stroke volume someone would show if they engaged in athletic training.
B)   the increase in cardiac output an individual is capable of demonstrating during vigorous exercise.
C)   the amount of blood left in the heart after the ventricle has contracted during cardiac cycles at rest.
D)   the blood that the heart uses to nourish its cardiac muscle and does not put into general circulation.E) B) and C)
F) None of the above

Question 16

About 70% of the ventricle filling is achieved passively without the contraction of the atria.

Accepted Answer

A) True 
 B)False

Question 17

The inferior, conical end of the heart is called the ________.

Accepted Answer

The answer of The inferior, conical end of the heart...

Question 18

Which are functions performed by the fibrous skeleton of the heart?
A: Separates the atria and ventricles
B: Anchors the heart valves
C: Provides electrical insulation between the atria and ventricles
D: Provides the framework for the attachment of the myocardium
E: None of these are true functions of the fibrous skeleton of the heart

Accepted Answer

A)   a, d
B)   b, d
C)   a, c, d
D)   a, b, c, d
E)   eF) A) and E)
G) A) and B)

Question 19

The metabolic pathways of cardiac muscle make it

Accepted Answer

A)   somewhat susceptible to heart attack, because it relies so exclusively on aerobic metabolism.
B)   extremely susceptible to heart attack, because it uses such a variety of fuel sources.
C)   somewhat susceptible to heart attack, because it has so few mitochondria.
D)   relatively resistant to heart attack, because it uses exclusively anaerobic metabolism.
E)   relatively resistant to heart attack, because it has a great capacity to accrue oxygen debt.F) All of the above
G) B) and D)

Question 20

Arteries carry blood toward the heart, while veins carry blood away from the heart.

Accepted Answer

A) True 
 B)False

Exam 19: Cardiovascular System: Heart

Sympathetic innervation of the heart A: increases the heart rate B: decreases the heart rate C: increases the force of contractions D: decreases the force of contractions E: has no effect on contraction force

Correct Answer
verified

Predictions related to homeostatic imbalance, including disease states & disorders. -In this figure showing an anterior view of the heart, the left atrium is noted by number

Correct Answer
verified

Which circuit of the cardiovascular system includes the left ventricle and aorta?

Correct Answer
verified

For the repolarization phase of an SA nodal cell action potential,

Correct Answer
verified

The metabolic pathways of cardiac muscle make it

Correct Answer
verified

At the AV node of the conduction system, the action potential is

Correct Answer
verified

Arteries carry blood toward the heart, while veins carry blood away from the heart.

Correct Answer
verified

The inferior, conical end of the heart is called the ________.

Correct Answer
verified

The pericardium helps prevent overfilling of the heart and it lessens the friction of movements during heartbeats.

Correct Answer
verified

Correct Answer
verified

Cardiac reserve is

Correct Answer
verified

Cardiac output is usually expressed in

Correct Answer
verified

During a cardiac cycle, how many of the four chambers contract at any one time?

Correct Answer
verified

Pectinate muscles are found on the

Correct Answer
verified

Contrast the length-tension relationship for cardiac muscle to that which is found in skeletal muscle. In other words, for each type of muscle, what is the optimal length? How is such an arrangement adaptive to cardiac muscle?

Correct Answer
verified
Unlike skeletal muscle, cardiac muscle d...
View Answer

If the stroke volume is unequal between the left and right ventricles, ________ may occur, which is excess fluid surrounding or within cells.

Correct Answer
verified

Myofibrils within cardiac muscle cells are aligned in sarcomeres.

Correct Answer
verified

The base of the heart faces in the ________ directions.

Correct Answer
verified

Which segment of the ECG reflects the plateau phase of ventricular muscle cells' action potentials?

Correct Answer
verified

About 70% of the ventricle filling is achieved passively without the contraction of the atria.

Correct Answer
verified

Exam 19: Cardiovascular System: Heart

Sympathetic innervation of the heart A: increases the heart rate B: decreases the heart rate C: increases the force of contractions D: decreases the force of contractions E: has no effect on contraction force

Correct AnswerverifiedShow Answer

Predictions related to homeostatic imbalance, including disease states & disorders. -In this figure showing an anterior view of the heart, the left atrium is noted by number

Correct AnswerverifiedShow Answer

Which circuit of the cardiovascular system includes the left ventricle and aorta?

Correct AnswerverifiedShow Answer

For the repolarization phase of an SA nodal cell action potential,

Correct AnswerverifiedShow Answer

The metabolic pathways of cardiac muscle make it

Correct AnswerverifiedShow Answer

At the AV node of the conduction system, the action potential is

Correct AnswerverifiedShow Answer

Arteries carry blood toward the heart, while veins carry blood away from the heart.

Correct AnswerverifiedShow Answer

The inferior, conical end of the heart is called the ________.

Correct AnswerverifiedShow Answer

The pericardium helps prevent overfilling of the heart and it lessens the friction of movements during heartbeats.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Cardiac reserve is

Correct AnswerverifiedShow Answer

Cardiac output is usually expressed in

Correct AnswerverifiedShow Answer

During a cardiac cycle, how many of the four chambers contract at any one time?

Correct AnswerverifiedShow Answer

Pectinate muscles are found on the

Correct AnswerverifiedShow Answer

Contrast the length-tension relationship for cardiac muscle to that which is found in skeletal muscle. In other words, for each type of muscle, what is the optimal length? How is such an arrangement adaptive to cardiac muscle?

Correct AnswerverifiedUnlike skeletal muscle, cardiac muscle d...View AnswerShow Answer

If the stroke volume is unequal between the left and right ventricles, ________ may occur, which is excess fluid surrounding or within cells.

Correct AnswerverifiedShow Answer

Myofibrils within cardiac muscle cells are aligned in sarcomeres.

Correct AnswerverifiedShow Answer

The base of the heart faces in the ________ directions.

Correct AnswerverifiedShow Answer

Which segment of the ECG reflects the plateau phase of ventricular muscle cells' action potentials?

Correct AnswerverifiedShow Answer

About 70% of the ventricle filling is achieved passively without the contraction of the atria.

Correct AnswerverifiedShow Answer

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verified
Unlike skeletal muscle, cardiac muscle d...
View Answer

Correct Answer
verified

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Correct Answer
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Correct Answer
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Correct Answer
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