Question 1

Indicate the proper order of the events during the cardiac cycle by placing numbers in the blanks preceding the events in sequence. The first and last events are already so indicated as a guide.

Accepted Answer

1, 8, 11, ...

Question 2

The heart chamber that received blood from the vena cava is the:

Accepted Answer

A)   right ventricle.
B)   left ventricle.
C)   left atrium.
D)   right atrium.
E)   both (c)  and (d) F) A) and E)
G) A) and D)

Question 3

The term systole means

Accepted Answer

A)   closure.
B)   conduction.
C)   contraction.
D)   opening.
E)   relaxation.F) B) and D)
G) A) and B)

Question 4

Most ventricular filling is accomplished during atrial contraction.

Accepted Answer

A) True 
 B)False

Question 5

An increased ESV ____________________ the stroke volume.

Accepted Answer

The answer of An increased ESV ____________________ the stroke volume....

Question 6

According to the Frank-Starling law of the heart,

Accepted Answer

A)   the shorter the initial length of the cardiac muscle fibers prior to contraction the more forceful will be the subsequent contraction, because the fibers are already partially contracted.
B)   increasing the venous return increases the end-diastolic volume, which leads to an increased stroke volume, so the heart normally pumps out all of the blood returned to it.
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 because the right side only pumps blood to the lungs, whereas the left side must pump blood to the rest of the body.
E)   the greater the stroke volume, the smaller will be the subsequent end-diastolic volume because as more blood is squeezed out, the heart cannot fill as completely.F) C) and E)
G) D) and E)

Question 7

A whistling murmur heard between the second and first heart sound would be indicative of

Accepted Answer

A)   a stenotic AV valve.
B)   an insufficient AV valve.
C)   a stenotic aortic or pulmonary semilunar valve.
D)   an insufficient aortic or pulmonary semilunar valve.
E)   no conclusions can be reached based on the information provided.F) A) and B)
G) B) and E)

Question 8

Describe the cardiac cycle.

Accepted Answer

During ventricular filling, the AV valve...

Question 9

Stroke volume is determined by the extent of venous return and parasympathetic activity.

Accepted Answer

A) True 
 B)False

Question 10

An increase in cardiac sympathetic activity ____________________ the contractility of the ventricles.

Accepted Answer

The answer of An increase in cardiac sympathetic activity ____________________...

Question 11

The long refractory period of cardiac muscle prevents tetanic contractions of the heart.

Accepted Answer

A) True 
 B)False

Question 12

Compare and contrast intrinsic and extrinsic controls of cardiac activity.

Accepted Answer

Intrinsic control of stroke volume (the ...

Question 13

The bundle of His and Purkinje system facilitate the rapid spread of the action potential throughout the ventricles.

Accepted Answer

A) True 
 B)False

Question 14

Use the answer code below to complete the following statements.
-The volume of blood ejected by each ventricle each minute is known as the _____.

Accepted Answer

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

Question 15

The time period between the P wave and the QRS complex is lengthened. Which of the following is likely not functioning correctly?

Accepted Answer

A)   SA node.
B)   AV node.
C)   bundle of His.
D)   Purkinje system.
E)   ventricular myocardium.F) A) and D)
G) B) and E)

Question 16

The aortic valve

Accepted Answer

A)   prevents the backflow of blood into the aorta during ventricular diastole.
B)   prevents the backflow of blood into the left ventricle during ventricular diastole.
C)   prevents the backflow of blood into the right ventricle during ventricular diastole.
D)   closes when the first heart sound is heard.
E)   none of these answers.F) B) and D)
G) B) and C)

Question 17

The second heart sound is produced by the

Accepted Answer

A)   opening of the AV valves.
B)   closing of the AV valves.
C)   opening of the semilunar valves.
D)   closing of the semilunar valves.
E)   blood rushing through the AV valves during diastole, creating a turbulent flow.F) All of the above
G) C) and D)

Question 18

All of the following decrease overall cardiac function except

Accepted Answer

A)   acetylcholine.
B)   NE
C)   afterload.
D)   parasympathetic activity.
E)   vagal activity.F) None of the above
G) A) and C)

Question 19

Using the following answer code, indicate which pressure relationship exists during the time in question.
-during ventricular diastole

Accepted Answer

A)  aortic pressure > ventricular pressure > atrial pressure
B)  ventricular pressure > aortic pressure > atrial pressure
C)  aortic pressure > atrial pressure > ventricular pressure
D)  ventricular pressure > atrial pressure > aortic pressure
E)  atrial pressure > ventricular pressure > aortic pressureF) B) and E)
G) C) and E)

Question 20

Which heart component is influence by NE but not by ACh?

Accepted Answer

A)   ventricular.
B)   AV node.
C)   heart rate.
D)   SA node.
E)   none of the aboveF) A) and D)
G) A) and C)

Exam 9: Cardiac Physiology

The term systole means

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The time period between the P wave and the QRS complex is lengthened. Which of the following is likely not functioning correctly?

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Compare and contrast intrinsic and extrinsic controls of cardiac activity.

Correct AnswerverifiedIntrinsic control of stroke volume (the ...View AnswerShow Answer

An increased ESV ____________________ the stroke volume.

Correct AnswerverifiedShow Answer

The aortic valve

Correct AnswerverifiedShow Answer

The second heart sound is produced by the

Correct AnswerverifiedShow Answer

An increase in cardiac sympathetic activity ____________________ the contractility of the ventricles.

Correct AnswerverifiedShow Answer

The heart chamber that received blood from the vena cava is the:

Correct AnswerverifiedShow Answer

The bundle of His and Purkinje system facilitate the rapid spread of the action potential throughout the ventricles.

Correct AnswerverifiedShow Answer

Using the following answer code, indicate which pressure relationship exists during the time in question. -during ventricular diastole

Correct AnswerverifiedShow Answer

Which heart component is influence by NE but not by ACh?

Correct AnswerverifiedShow Answer

Describe the cardiac cycle.

Correct AnswerverifiedDuring ventricular filling, the AV valve...View AnswerShow Answer

Use the answer code below to complete the following statements. -The volume of blood ejected by each ventricle each minute is known as the _____.

Correct AnswerverifiedShow Answer

Stroke volume is determined by the extent of venous return and parasympathetic activity.

Correct AnswerverifiedShow Answer

The long refractory period of cardiac muscle prevents tetanic contractions of the heart.

Correct AnswerverifiedShow Answer

According to the Frank-Starling law of the heart,

Correct AnswerverifiedShow Answer

A whistling murmur heard between the second and first heart sound would be indicative of

Correct AnswerverifiedShow Answer

All of the following decrease overall cardiac function except

Correct AnswerverifiedShow Answer

Most ventricular filling is accomplished during atrial contraction.

Correct AnswerverifiedShow Answer

Indicate the proper order of the events during the cardiac cycle by placing numbers in the blanks preceding the events in sequence. The first and last events are already so indicated as a guide.

Correct Answerverified1, 8, 11, ...View AnswerShow Answer

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Intrinsic control of stroke volume (the ...
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During ventricular filling, the AV valve...
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1, 8, 11, ...
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