Question 1

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 period 
A) atrial diastole 
B) atrial systole 
C) ventricular fibrillation 
D) ventricular systole 
E) the relaxation period B

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

Acetylcholine released by the parasympathetic fibers increases the heart rate.

Accepted Answer

A) True 
 B)False  False

Question 4

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 5

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

Question 6

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

Question 7

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

Question 8

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 valve 
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 valve

Question 9

Briefly describe the diagnostic value of an electrocardiogram.

Accepted Answer

The ECG is used to diagnose ab

Question 10

List the three phases of the cardiac cycle.

Accepted Answer

1)Relaxation period,

Question 11

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. 
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.

Question 12

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

Accepted Answer

A) hypothalamus 
B) thalamus 
C) pons 
D) midbrain 
E) medulla oblongata 
A) hypothalamus 
B) thalamus 
C) pons 
D) midbrain 
E) medulla oblongata

Question 13

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 correct 
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 correct

Question 14

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 quarter 
A) three times 
B) double 
C) four times 
D) half 
E) one quarter

Question 15

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 16

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) interventricular 
A) pulmonary 
B) aortic 
C) bicuspid 
D) tricuspid 
E) interventricular

Question 17

Define cardiac output and explained how it is calculated.

Accepted Answer

Cardiac output (CO)is the amount of bloo

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 thickness 
A) left atrium 
B) right atrium 
C) left ventricle 
D) right ventricle 
E) all heart chambers have equal thickness

Question 19

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) aorta 
A) vena cavae 
B) pulmonary arteries 
C) pulmonary trunk 
D) pulmonary veins 
E) aorta

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 15: The Cardiovascular System: Heart

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

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

Acetylcholine released by the parasympathetic fibers increases the heart rate.

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.

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

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.

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

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

Briefly describe the diagnostic value of an electrocardiogram.

List the three phases of the cardiac cycle.

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

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

In an ECG, atrial repolarization is indicated by

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

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

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

Define cardiac output and explained how it is calculated.

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

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

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

Organization of the Human Body

Introductory Chemistry

Cells

Tissues

The Integumentary System

The Skeletal System

Joints

The Muscular System

Nervous Tissue

Central Nervous System, Spinal Nerves, and Cranial Nerves

Autonomic Nervous System

Somatic Senses and Special Sense

The Endocrine System

The Cardiovascular System: Blood

The Cardiovascular System: Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Nutrition and Metabolism

The Urinary System

Fluid, Electrolyte, and Acid-Base Balance

The Reproductive Systems

Development and Inheritance

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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.