Question 1

In an ECG, atrial repolarization is indicated by

Accepted Answer

A)  the P wave
B)  the QRS wave
C)  the T wave
D)  the R portion of the QRS
E)  bone of the choices is correctF) B) and E)
G) A) and C)

Question 2

The beginning of an atherosclerotic plaque occurs when a "fatty streak" in the vessel wall is formed from macrophages eating accumulated LDL particles.

Accepted Answer

A) True 
 B)False  True

Question 3

Which of the following blood vessels delivers deoxygenated blood to the right atrium?

Accepted Answer

A)  vena cavae
B)  pulmonary arteries
C)  pulmonary trunk
D)  pulmonary veins
E)  aortaF) A) and E)
G) B) and E)

Question 4

Acetylcholine released by the parasympathetic fibers increases the heart rate.

Accepted Answer

A) True 
 B)False  False

Question 5

The pericardium is composed of three layers. The outer layer is the parietal pericardium. The middle layer is the visceral pericardium. The innermost layer is called the fibrous pericardium or epicardium.

Accepted Answer

A) True 
 B)False

Question 6

Between steps 7 and 8 in the diagram of blood flow through the heart, blood moves through the ___ valve.

Accepted Answer

A)  pulmonary
B)  aortic
C)  bicuspid
D)  tricuspid
E)  interventricularF) B) and D)
G) A) and C)

Question 7

Briefly describe the diagnostic value of an electrocardiogram.

Accepted Answer

The ECG is used to diagnose ab...

Question 8

The cardiovascular (CV) center that regulates cardiac output is located in the

Accepted Answer

A)  hypothalamus
B)  thalamus
C)  pons
D)  midbrain
E)  medulla oblongataF) All of the above
G) B) and C)

Question 9

In the diagram of the heart action potential conduction system, the structure labeled A is called the ___, which spontaneously creates action potentials at a rate of approximately ___ times per minute.

Accepted Answer

A)  SA node, 100
B)  AV node, 100
C)  SA node, 40 to 60
D)  AV node, 20 to 60
E)  SA node, 75F) B) and E)
G) A) and C)

Question 10

Which of the following does NOT directly affect stroke volume of the left ventricle?

Accepted Answer

A)  degree of stretch of the ventricle
B)  Frank-Starling law.
C)  amount of blood in ventricle prior to contraction
D)  parasympathetic stimulation
E)  pressure needed to open the aortic valveF) C) and D)
G) A) and C)

Question 11

During strenuous exercise, a well-trained athlete can achieve a cardiac output that is ___ that of a sedentary person.

Accepted Answer

A)  three times
B)  double
C)  four times
D)  half
E)  one quarterF) None of the above
G) All of the above

Question 12

At a normal resting heart rate, the last 25% of the blood that fills the ventricles enters during

Accepted Answer

A)  atrial diastole
B)  atrial systole
C)  ventricular fibrillation
D)  ventricular systole
E)  the relaxation periodF) A) and D)
G) C) and E) B

Question 13

Ischemia, hypoxia, angina pectoris and myocardial infarction all result from a lack of oxygen to the heart tissue.

Accepted Answer

A) True 
 B)False

Question 14

The heart valve found between the left atrium and left ventricle is the

Accepted Answer

A)  bicuspid valve
B)  tricuspid valve
C)  aortic semilunar valve
D)  pulmonary semilunar valve
E)  sinoatrial valveF) B) and C)
G) C) and D)

Question 15

List the three phases of the cardiac cycle.

Accepted Answer

1)Relaxation period,...

Question 16

List the correct sequence of the structures that the cardiac action potential passes through as it stimulates contraction of the heart.

Accepted Answer

Sinoatrial (SA)node, atriovent...

Question 17

Which of the following characteristics would NOT commonly be observed in a well-trained endurance athlete?

Accepted Answer

A)  physiological cardiomegaly
B)  resting bradycardia
C)  increased stroke volume
D)  decreased heart rate
E)  increased resting cardiac outputF) A) and C)
G) B) and C)

Question 18

Which of the following chambers of the heart has the thickest myocardium?

Accepted Answer

A)  left atrium
B)  right atrium
C)  left ventricle
D)  right ventricle
E)  all heart chambers have equal thicknessF) A) and B)
G) All of the above

Question 19

Define cardiac output and explained how it is calculated.

Accepted Answer

Cardiac output (CO)is the amount of bloo...

Question 20

Impulses carried from the cardiovascular center to the heart by means of the vagus nerve are

Accepted Answer

A)  parasympathetic impulses that increase the heart rate.
B)  parasympathetic impulses that decrease the heart rate.
C)  sympathetic impulses that increase the heart rate.
D)  sympathetic impulses that decrease the heart rate.
E)  autonomic impulses that primarily affect stroke volume.F) C) and E)
G) C) and D)

Exam 15: The Cardiovascular System: Heart

In an ECG, atrial repolarization is indicated by

Correct AnswerverifiedShow Answer

The beginning of an atherosclerotic plaque occurs when a "fatty streak" in the vessel wall is formed from macrophages eating accumulated LDL particles.

Correct AnswerverifiedTrue

Which of the following blood vessels delivers deoxygenated blood to the right atrium?

Correct AnswerverifiedShow Answer

Acetylcholine released by the parasympathetic fibers increases the heart rate.

Correct AnswerverifiedFalse

The pericardium is composed of three layers. The outer layer is the parietal pericardium. The middle layer is the visceral pericardium. The innermost layer is called the fibrous pericardium or epicardium.

Correct AnswerverifiedShow Answer

Between steps 7 and 8 in the diagram of blood flow through the heart, blood moves through the ___ valve.

Correct AnswerverifiedShow Answer

Briefly describe the diagnostic value of an electrocardiogram.

Correct AnswerverifiedThe ECG is used to diagnose ab...View AnswerShow Answer

The cardiovascular (CV) center that regulates cardiac output is located in the

Correct AnswerverifiedShow Answer

In the diagram of the heart action potential conduction system, the structure labeled A is called the ___, which spontaneously creates action potentials at a rate of approximately ___ times per minute.

Correct AnswerverifiedShow Answer

Which of the following does NOT directly affect stroke volume of the left ventricle?

Correct AnswerverifiedShow Answer

During strenuous exercise, a well-trained athlete can achieve a cardiac output that is ___ that of a sedentary person.

Correct AnswerverifiedShow Answer

At a normal resting heart rate, the last 25% of the blood that fills the ventricles enters during

Correct AnswerverifiedB

Ischemia, hypoxia, angina pectoris and myocardial infarction all result from a lack of oxygen to the heart tissue.

Correct AnswerverifiedShow Answer

The heart valve found between the left atrium and left ventricle is the

Correct AnswerverifiedShow Answer

List the three phases of the cardiac cycle.

Correct Answerverified1)Relaxation period,...View AnswerShow Answer

List the correct sequence of the structures that the cardiac action potential passes through as it stimulates contraction of the heart.

Correct AnswerverifiedSinoatrial (SA)node, atriovent...View AnswerShow Answer

Which of the following characteristics would NOT commonly be observed in a well-trained endurance athlete?

Correct AnswerverifiedShow Answer

Which of the following chambers of the heart has the thickest myocardium?

Correct AnswerverifiedShow Answer

Define cardiac output and explained how it is calculated.

Correct AnswerverifiedCardiac output (CO)is the amount of bloo...View AnswerShow Answer

Impulses carried from the cardiovascular center to the heart by means of the vagus nerve are

Correct AnswerverifiedShow Answer

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True

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False

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The ECG is used to diagnose ab...
View Answer

Correct Answer
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In the diagram of the heart action potential conduction system, the structure labeled A is called the _, which spontaneously creates action potentials at a rate of approximately _ times per minute.

Correct Answer
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B

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1)Relaxation period,...
View Answer

Correct Answer
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Sinoatrial (SA)node, atriovent...
View Answer

Correct Answer
verified

Correct Answer
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Correct Answer
verified
Cardiac output (CO)is the amount of bloo...
View Answer

Correct Answer
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