Question 1

Which of the following correctly identifies the phases of the cardiac cycle?

Accepted Answer

A)  Atrial systole,atrial filling,ventricular systole,ventricular diastole,ventricular filling 
B)  Passive ventricular filling,atrial systole,isovolumetric contraction,ventricular ejection,isovolumetric relaxation 
C)  Right atrium,tricuspid valve opens,right ventricle,pulmonary artery to lungs,pulmonary veins to left atrium,mitral valve opens,left ventricle,aortic valve opens,left ventricle contracts 
D)  Right atrium contracts,right ventricle contracts,left atrium contracts,left ventricle contracts 
A)  Atrial systole,atrial filling,ventricular systole,ventricular diastole,ventricular filling 
B)  Passive ventricular filling,atrial systole,isovolumetric contraction,ventricular ejection,isovolumetric relaxation 
C)  Right atrium,tricuspid valve opens,right ventricle,pulmonary artery to lungs,pulmonary veins to left atrium,mitral valve opens,left ventricle,aortic valve opens,left ventricle contracts 
D)  Right atrium contracts,right ventricle contracts,left atrium contracts,left ventricle contracts B

Question 2

What causes a myocardial infarction?

Accepted Answer

A)  Ischemia in the heart tissue 
B)  Cigarette smoking and obesity 
C)  A blood clot or fatty deposit in a coronary artery 
D)  High blood levels of cholesterol 
A)  Ischemia in the heart tissue 
B)  Cigarette smoking and obesity 
C)  A blood clot or fatty deposit in a coronary artery 
D)  High blood levels of cholesterol C

Question 3

A patient who normally has a pulse rate of 82 beats per minute is admitted to the cardiac unit with a pulse rate of 46 beats per minute.Which part of the cardiac conduction system is most likely initiating cardiac impulses?

Accepted Answer

A)  SA node 
B)  AV node 
C)  Purkinje fibers 
D)  Left ventricle 
A)  SA node 
B)  AV node 
C)  Purkinje fibers 
D)  Left ventricle B

Question 4

What effect,if any,would persistent tachycardia have on cardiac output and why?

Accepted Answer

A)  It would have little or no effect because cardiac output is related to stroke volume,not heart rate. 
B)  It would decrease cardiac output because filling time is decreased,which decreases stroke volume. 
C)  It would increase cardiac output because tachycardia increases contractility,which increases stroke volume. 
D)  It would have little or no effect on cardiac output because tachycardia does not affect preload,afterload,or contractility. 
A)  It would have little or no effect because cardiac output is related to stroke volume,not heart rate. 
B)  It would decrease cardiac output because filling time is decreased,which decreases stroke volume. 
C)  It would increase cardiac output because tachycardia increases contractility,which increases stroke volume. 
D)  It would have little or no effect on cardiac output because tachycardia does not affect preload,afterload,or contractility.

Question 5

The coronary arteries receive their blood supply when

Accepted Answer

A)  the ventricles contract. 
B)  the atria contract. 
C)  the atria relax. 
D)  both ventricles relax. 
A)  the ventricles contract. 
B)  the atria contract. 
C)  the atria relax. 
D)  both ventricles relax.

Question 6

The heart is located in a space in the thoracic cavity called the ____________________.

Accepted Answer

The answer of The heart is located in a space...

Question 7

What causes the cardiac valves to open and close?

Accepted Answer

A)  Chordae tendineae contract and relax to open and close the valves. 
B)  Papillary muscles contract and relax to open and close the valves. 
C)  As the walls of the heart's chambers stretch or relax,they send nervous impulses to the valves,stimulating them to open or close. 
D)  Pressure changes in the cardiac chambers cause the valves to open and close. 
A)  Chordae tendineae contract and relax to open and close the valves. 
B)  Papillary muscles contract and relax to open and close the valves. 
C)  As the walls of the heart's chambers stretch or relax,they send nervous impulses to the valves,stimulating them to open or close. 
D)  Pressure changes in the cardiac chambers cause the valves to open and close.

Question 8

A weak left ventricle will have the greatest impact on

Accepted Answer

A)  preload. 
B)  contractility. 
C)  afterload. 
D)  heart rate. 
A)  preload. 
B)  contractility. 
C)  afterload. 
D)  heart rate.

Question 9

What effect will a positive inotropic medication have on cardiac function?

Accepted Answer

A)  It will decrease afterload. 
B)  It will increase preload. 
C)  It will increase preload and decrease afterload. 
D)  It will increase contractility. 
A)  It will decrease afterload. 
B)  It will increase preload. 
C)  It will increase preload and decrease afterload. 
D)  It will increase contractility.

Question 10

The ejection fraction is a measurement directly related to

Accepted Answer

A)  contractility. 
B)  cardiac output. 
C)  stroke volume. 
D)  systolic pressure. 
A)  contractility. 
B)  cardiac output. 
C)  stroke volume. 
D)  systolic pressure.

Question 11

A stenotic aortic valve will increase

Accepted Answer

A)  afterload. 
B)  stroke volume. 
C)  preload. 
D)  contractility. 
A)  afterload. 
B)  stroke volume. 
C)  preload. 
D)  contractility.

Question 12

What term refers to the heart's ability to initiate its own electrical impulse?

Accepted Answer

A)  Rhythmicity 
B)  Automaticity 
C)  Arrhythmia 
D)  Ectopy 
A)  Rhythmicity 
B)  Automaticity 
C)  Arrhythmia 
D)  Ectopy

Question 13

The area where the strongest heartbeat can be felt or heard is called the ____________________.

Accepted Answer

point of m

Question 14

Stimulation of the vagus nerve will have what effect on the heart?

Accepted Answer

A)  Increase heart rate 
B)  Decrease heart rate 
C)  Increase contractility 
D)  Decrease contractility 
A)  Increase heart rate 
B)  Decrease heart rate 
C)  Increase contractility 
D)  Decrease contractility

Question 15

Left-sided heart failure will cause pulmonary ____________________.

Accepted Answer

The answer of Left-sided heart failure will cause pulmonary ____________________....

Question 16

The cardiac impulse normally slows down at

Accepted Answer

A)  the bundle of His to wait for the atrial "kick." 
B)  the AV node to give the atria time to empty and the ventricles time to fill. 
C)  the SA node to prevent a too rapid heart rate. 
D)  the Purkinje fibers to give the ventricles time to empty and the atria time to fill. 
A)  the bundle of His to wait for the atrial "kick." 
B)  the AV node to give the atria time to empty and the ventricles time to fill. 
C)  the SA node to prevent a too rapid heart rate. 
D)  the Purkinje fibers to give the ventricles time to empty and the atria time to fill.

Question 17

In which area of the brain is the cardiac center located?

Accepted Answer

A)  Frontal lobe 
B)  Pons 
C)  Diencephalon 
D)  Medulla 
A)  Frontal lobe 
B)  Pons 
C)  Diencephalon 
D)  Medulla

Question 18

The series of events that occur from the beginning of one heartbeat to the beginning of the next is the

Accepted Answer

A)  systolic cycle. 
B)  diastolic cycle. 
C)  cardiac cycle. 
D)  atrial-ventricular cycle. 
A)  systolic cycle. 
B)  diastolic cycle. 
C)  cardiac cycle. 
D)  atrial-ventricular cycle.

Question 19

The action that supplies the ventricles with the last 30% of blood is called ____________________.

Accepted Answer

The answer of The action that supplies the ventricles with...

Question 20

A heart valve that has become narrowed,such as from scar tissue,is said to be ____________________.

Accepted Answer

The answer of A heart valve that has become narrowed,such...

Exam 14: Heart

Which of the following correctly identifies the phases of the cardiac cycle?

What causes a myocardial infarction?

A patient who normally has a pulse rate of 82 beats per minute is admitted to the cardiac unit with a pulse rate of 46 beats per minute.Which part of the cardiac conduction system is most likely initiating cardiac impulses?

What effect,if any,would persistent tachycardia have on cardiac output and why?

The coronary arteries receive their blood supply when

The heart is located in a space in the thoracic cavity called the ____________________.

What causes the cardiac valves to open and close?

A weak left ventricle will have the greatest impact on

What effect will a positive inotropic medication have on cardiac function?

The ejection fraction is a measurement directly related to

A stenotic aortic valve will increase

What term refers to the heart's ability to initiate its own electrical impulse?

The area where the strongest heartbeat can be felt or heard is called the ____________________.

Stimulation of the vagus nerve will have what effect on the heart?

Left-sided heart failure will cause pulmonary ____________________.

The cardiac impulse normally slows down at

In which area of the brain is the cardiac center located?

The series of events that occur from the beginning of one heartbeat to the beginning of the next is the

The action that supplies the ventricles with the last 30% of blood is called ____________________.

A heart valve that has become narrowed,such as from scar tissue,is said to be ____________________.

Orientation to the Human Body

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