Question 1

Which of these statements refers to the Frank-Starling law of the heart

Accepted Answer

A)  The shorter the initial length of the cardiac muscle fibres prior to contraction, the more forceful will be the subsequent contraction.
B)  Increasing the venous return increases the end-diastolic volume, which leads to an increased stroke volume.
C)  As cardiac output is reduced, blood pools in the vasculature so that arterial blood pressure increases.
D)  The output of the left side of the heart must always exceed that of the right side of the heart.E) A) and B)
F) A) and D)

Question 2

Match the anatomical structures, labelled a. through e., with the heart characteristics. (Options may be used more than once or not at all.) 
-its fast Ca²⁺ channels help initiate

Accepted Answer

A)  tricuspid valve
B)  myocardium
C)  aortic semilunar valve
D)  AV node
E)  sinoatrial nodeF) A) and C)
G) C) and E)

Question 3

Which of these terms refers to the term systole

Accepted Answer

A)  closure
B)  conduction
C)  contraction
D)  openingE) B) and C)
F) None of the above

Question 4

What is the purpose of the AV nodal delay

Accepted Answer

A)  to ensure that all blood from the atria flows into the ventricles prior to ventricular systole
B)  to ensure that all blood from the ventricles flows into the atria prior to atrial systole
C)  to ensure that tetanic contraction of cardiac muscle is not possible
D)  to ensure that heart rate slows down by parasympathetic stimulationE) C) and D)
F) B) and D)

Question 5

Which of these events is happening during the isovolumetric phase of ventricular systole

Accepted Answer

A)  The ventricles are relaxed isometrically.
B)  The atrioventricular valves and semilunar valves are closed.
C)  Blood is being ejected into the great vessels.
D)  Venous blood is flowing back to the heart.E) C) and D)
F) A) and B)

Question 6

What is the normal direction of the impulse through the conduction system of the heart for each cardiac cycle

Accepted Answer

A)  AV node to SA node to bundle of His to Purkinje fibres
B)  AV node to bundle of His to SA node to Purkinje fibres
C)  bundle of His to AV node to Purkinje fibres to SA node
D)  SA node to AV node to bundle of His to Purkinje fibresE) A) and D)
F) A) and B)

Question 7

Which of these statements describes why the heart valves open and close

Accepted Answer

A)  There is prolonged calcium influx.
B)  There is turbulent flow in the atria and ventricles.
C)  Na+ and K⁺ fluxes occur during ventricular depolarization.
D)  There is a pressure difference on the two sides of the valve.E) A) and C)
F) B) and C)

Question 8

Sympathetic stimulation increases the heart rate.

Accepted Answer

A) True 
 B)False

Question 9

The plateau phase of the action potential in a contractile cardiac muscle cell occurs as a result of activation of slow Ca²⁺ channels.

Accepted Answer

A) True 
 B)False

Question 10

The ____________________ is the volume of blood pumped by each ventricle/minute.

Accepted Answer

The answer of The ____________________ is the volume of blood...

Question 11

An increase in the end-diastolic volume ____________________ the stroke volume.

Accepted Answer

The answer of An increase in the end-diastolic volume ____________________...

Question 12

Match the terms, labelled a. through f., with the descriptions. (Options may be used more than once or not at all.) 
-The maximum volume of blood that the ventricle contains after filling is complete is the _____.

Accepted Answer

A)  stroke volume
B)  end-diastolic volume
C)  cardiac output
D)  heart rate
E)  end-systolic volumeF) sympathetic activityG) A) and E)
H) D) and F)

Question 13

Match the terms, labelled a. through f., with the descriptions. (Options may be used more than once or not at all.) 
-The minimum volume of blood that the ventricle contains after emptying is complete is the _____.

Accepted Answer

A)  stroke volume
B)  end-diastolic volume
C)  cardiac output
D)  heart rate
E)  end-systolic volumeF) sympathetic activityG) None of the above
H) C) and E)

Question 14

Which of the following factors will NOT increase cardiac output

Accepted Answer

A)  increased venous return
B)  increased parasympathetic stimulation
C)  increased preload
D)  increased heart rateE) A) and B)
F) A) and C)

Question 15

The ____________________ extracts cholesterol from the blood and converts it into ____________________, which are secreted into the bile.

Accepted Answer

The answer of The ____________________ extracts cholesterol from the blood...

Question 16

Describe the primary factors that influence cardiac output.

Accepted Answer

Cardiac output is influenced by several ...

Question 17

Sympathetic stimulation of the heart increases calcium permeability.

Accepted Answer

A) True 
 B)False

Question 18

Match the term, labelled 
Match the term, labelled a. through g., with their correct characteristic.
-muscle mass that becomes excited and contracts as a unit

Accepted Answer

A)  gap junction
B)  HDL
C)  functional syncytium
D)  heart valve
E)  pericardial sacF) LDLG) adenosineH) C) and G)
I) F) and G)

Question 19

The ____________________ are the kinds of blood vessels that experience congestion for congestive heart failure.

Accepted Answer

The answer of The ____________________ are the kinds of blood...

Question 20

Match the factor involved in the initiation and spread of cardiac excitation, labelled a. through d. with the description. (Options may be used more than once or not at all.) 
-delays conduction of the impulse

Accepted Answer

A)  SA node
B)  AV node
C)  bundle of His and Purkinje system
D)  gap junctionE) B) and C)
F) A) and B)

Exam 8: Cardiac Physiology

Which of these statements refers to the Frank-Starling law of the heart

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Match the terms, labelled a. through f., with the descriptions. (Options may be used more than once or not at all.) -The maximum volume of blood that the ventricle contains after filling is complete is the _____.

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Which of these terms refers to the term systole

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Match the factor involved in the initiation and spread of cardiac excitation, labelled a. through d. with the description. (Options may be used more than once or not at all.) -delays conduction of the impulse

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Which of these statements describes why the heart valves open and close

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The ____________________ is the volume of blood pumped by each ventricle/minute.

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The ____________________ are the kinds of blood vessels that experience congestion for congestive heart failure.

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Match the term, labelled Match the term, labelled a. through g., with their correct characteristic. -muscle mass that becomes excited and contracts as a unit

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Which of the following factors will NOT increase cardiac output

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The ____________________ extracts cholesterol from the blood and converts it into ____________________, which are secreted into the bile.

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Which of these events is happening during the isovolumetric phase of ventricular systole

Correct AnswerverifiedShow Answer

Sympathetic stimulation increases the heart rate.

Correct AnswerverifiedShow Answer

Match the terms, labelled a. through f., with the descriptions. (Options may be used more than once or not at all.) -The minimum volume of blood that the ventricle contains after emptying is complete is the _____.

Correct AnswerverifiedShow Answer

The plateau phase of the action potential in a contractile cardiac muscle cell occurs as a result of activation of slow Ca²⁺ channels.

Correct AnswerverifiedShow Answer

Match the anatomical structures, labelled a. through e., with the heart characteristics. (Options may be used more than once or not at all.) -its fast Ca²⁺ channels help initiate

Correct AnswerverifiedShow Answer

Describe the primary factors that influence cardiac output.

Correct AnswerAnswered by ExamLex AICardiac output is influenced by several ...View AnswerShow Answer

What is the purpose of the AV nodal delay

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An increase in the end-diastolic volume ____________________ the stroke volume.

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What is the normal direction of the impulse through the conduction system of the heart for each cardiac cycle

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Sympathetic stimulation of the heart increases calcium permeability.

Correct AnswerverifiedShow Answer

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The extracts cholesterol from the blood and converts it into , which are secreted into the bile.

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Cardiac output is influenced by several ...
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