Question 1

Figure 20-1 The Heart
Use Figure 20-1 to answer the following questions:
-Identify the structure(s)labeled "8."

Accepted Answer

A) moderator band 
B) pectinate muscles 
C) papillary muscles 
D) trabeculae carneae 
E) chordae tendineae 
A) moderator band 
B) pectinate muscles 
C) papillary muscles 
D) trabeculae carneae 
E) chordae tendineae

Question 2

Cardiac output can be increased by all of the following except

Accepted Answer

A) decreasing ejection fraction. 
B) decreasing end systolic volume. 
C) increasing stroke volume. 
D) increasing ejection fraction. 
E) increasing heart rate. 
A) decreasing ejection fraction. 
B) decreasing end systolic volume. 
C) increasing stroke volume. 
D) increasing ejection fraction. 
E) increasing heart rate.

Question 3

In cardiac muscle,

Accepted Answer

A) calcium ions are not released from the sarcoplasmic reticulum. 
B) calcium ions do not bind to troponin molecules. 
C) calcium ions play no role in the process of contraction. 
D) about 20 percent of the calcium ion required for contraction comes from outside the cell. 
E) calcium ions play an important role in repolarizing the membrane after the depolarization phase. 
A) calcium ions are not released from the sarcoplasmic reticulum. 
B) calcium ions do not bind to troponin molecules. 
C) calcium ions play no role in the process of contraction. 
D) about 20 percent of the calcium ion required for contraction comes from outside the cell. 
E) calcium ions play an important role in repolarizing the membrane after the depolarization phase.

Question 4

The P wave of the electrocardiogram is a signal from

Accepted Answer

A) the SA node. 
B) depolarization of the AV node. 
C) depolarization of the atria. 
D) repolarization of the atria. 
E) depolarization of the ventricles. 
A) the SA node. 
B) depolarization of the AV node. 
C) depolarization of the atria. 
D) repolarization of the atria. 
E) depolarization of the ventricles.

Question 5

A patient has an end-diastolic volume of 125 ml.A heart attack has weakened her left ventricle so it can pump a stroke volume of only 40 ml.Calculate her end-systolic volume.

Accepted Answer

A) 85 ml 
B) 3)1 ml 
C) 5000 ml 
D) 165 ml 
E) There is not enough data given to calculate the end-systolic volume. 
A) 85 ml 
B) 3)1 ml 
C) 5000 ml 
D) 165 ml 
E) There is not enough data given to calculate the end-systolic volume.

Question 6

In order to perform a coronary artery bypass graft,a cardiac surgeon must

Accepted Answer

A) open the pericardial sac. 
B) open the myocardium to see the AV valves. 
C) visualize the pulmonary valve. 
D) visualize the carotid arteries. 
E) All of the answers are correct. 
A) open the pericardial sac. 
B) open the myocardium to see the AV valves. 
C) visualize the pulmonary valve. 
D) visualize the carotid arteries. 
E) All of the answers are correct.

Question 7

Depolarization of the ventricles is represented on an electrocardiogram by the

Accepted Answer

A) P wave. 
B) T wave. 
C) S wave. 
D) QRS complex. 
E) PR complex. 
A) P wave. 
B) T wave. 
C) S wave. 
D) QRS complex. 
E) PR complex.

Question 8

The visceral pericardium is the same as the

Accepted Answer

A) mediastinum. 
B) parietal pericardium. 
C) epicardium. 
D) myocardium. 
E) endocardium. 
A) mediastinum. 
B) parietal pericardium. 
C) epicardium. 
D) myocardium. 
E) endocardium.

Question 9

Figure 20-2 Cardiac Cycle
Use Figure 20-2 to answer the following questions:
-What occurs at the circled label "7" on the graph?

Accepted Answer

A) isovolumetric ventricular relaxation 
B) sympathetic stimulation 
C) isovolumetric ventricular contraction 
D) ventricular ejection 
E) ventricular filling 
A) isovolumetric ventricular relaxation 
B) sympathetic stimulation 
C) isovolumetric ventricular contraction 
D) ventricular ejection 
E) ventricular filling

Question 10

A heart murmur might be caused by

Accepted Answer

A) aortic valve insufficiency. 
B) mitral valve insufficiency. 
C) pulmonic valve insufficiency. 
D) swirling of blood in the ventricle. 
E) All of the answers are correct. 
A) aortic valve insufficiency. 
B) mitral valve insufficiency. 
C) pulmonic valve insufficiency. 
D) swirling of blood in the ventricle. 
E) All of the answers are correct.

Question 11

Compared to the right ventricle,the left ventricle has all the following characteristics except

Accepted Answer

A) has a thicker wall. 
B) is round in cross section. 
C) pumps a greater volume. 
D) works harder. 
E) produces about four to six times more pressure when it contracts. 
A) has a thicker wall. 
B) is round in cross section. 
C) pumps a greater volume. 
D) works harder. 
E) produces about four to six times more pressure when it contracts.

Question 12

The volume of blood ejected from each ventricle during a contraction is called the

Accepted Answer

A) end-diastolic volume. 
B) end-systolic volume. 
C) stroke volume. 
D) cardiac output. 
E) cardiac reserve. 
A) end-diastolic volume. 
B) end-systolic volume. 
C) stroke volume. 
D) cardiac output. 
E) cardiac reserve.

Question 13

If the connection between the SA node and AV node becomes blocked,

Accepted Answer

A) the ventricles will beat faster. 
B) the ventricles will beat more slowly. 
C) the ventricular beat will remain unchanged. 
D) cardiac output will increase. 
E) the atria will contract more forcefully. 
A) the ventricles will beat faster. 
B) the ventricles will beat more slowly. 
C) the ventricular beat will remain unchanged. 
D) cardiac output will increase. 
E) the atria will contract more forcefully.

Question 14

Heart rate is controlled by neurons of the cardiovascular center located in the

Accepted Answer

A) pons. 
B) thalamus. 
C) medulla oblongata. 
D) hypothalamus. 
E) higher centers. 
A) pons. 
B) thalamus. 
C) medulla oblongata. 
D) hypothalamus. 
E) higher centers.

Question 15

With each ventricular systole,

Accepted Answer

A) blood pressure remains steady. 
B) the ventricles fill with blood. 
C) blood pressure decreases. 
D) cardiac output decreases. 
E) blood pressure increases. 
A) blood pressure remains steady. 
B) the ventricles fill with blood. 
C) blood pressure decreases. 
D) cardiac output decreases. 
E) blood pressure increases.

Question 16

The structures responsible for distributing excitation to the contractile cells are

Accepted Answer

A) contractile cells. 
B) conducting cells. 
C) intercalated cells. 
D) pacemaker cells. 
E) intermodal cells. 
A) contractile cells. 
B) conducting cells. 
C) intercalated cells. 
D) pacemaker cells. 
E) intermodal cells.

Question 17

The ________ covers the outer surface of the heart.

Accepted Answer

A) epicardium 
B) myocardium 
C) endocardium 
D) parietal pericardium 
E) mediastinum 
A) epicardium 
B) myocardium 
C) endocardium 
D) parietal pericardium 
E) mediastinum

Question 18

The right ventricle pumps blood to the

Accepted Answer

A) right and left lungs. 
B) left ventricle. 
C) left atrium. 
D) aorta. 
E) right atrium. 
A) right and left lungs. 
B) left ventricle. 
C) left atrium. 
D) aorta. 
E) right atrium.

Question 19

The ________ receives blood from the superior vena cava and the inferior vena cava.

Accepted Answer

A) right ventricle 
B) left ventricle 
C) left atrium 
D) right atrium 
E) aorta 
A) right ventricle 
B) left ventricle 
C) left atrium 
D) right atrium 
E) aorta

Question 20

A slower-than-normal heart rate is called

Accepted Answer

A) tachycardia. 
B) bradycardia. 
C) hypercardia. 
D) hypocardia. 
E) procardia. 
A) tachycardia. 
B) bradycardia. 
C) hypercardia. 
D) hypocardia. 
E) procardia.

Exam 20: The Heart

Figure 20-1 The Heart Use Figure 20-1 to answer the following questions: -Identify the structure(s)labeled "8."

Cardiac output can be increased by all of the following except

In cardiac muscle,

The P wave of the electrocardiogram is a signal from

A patient has an end-diastolic volume of 125 ml.A heart attack has weakened her left ventricle so it can pump a stroke volume of only 40 ml.Calculate her end-systolic volume.

In order to perform a coronary artery bypass graft,a cardiac surgeon must

Depolarization of the ventricles is represented on an electrocardiogram by the

The visceral pericardium is the same as the

Figure 20-2 Cardiac Cycle Use Figure 20-2 to answer the following questions: -What occurs at the circled label "7" on the graph?

A heart murmur might be caused by

Compared to the right ventricle,the left ventricle has all the following characteristics except

The volume of blood ejected from each ventricle during a contraction is called the

If the connection between the SA node and AV node becomes blocked,

Heart rate is controlled by neurons of the cardiovascular center located in the

With each ventricular systole,

The structures responsible for distributing excitation to the contractile cells are

The ________ covers the outer surface of the heart.

The right ventricle pumps blood to the

The ________ receives blood from the superior vena cava and the inferior vena cava.

A slower-than-normal heart rate is called

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

Osseous Tissue and Bone Structure

The Axial Skeleton

The Appendicular Skeleton

Joints

Muscle Tissue

The Muscular System

Neural Tissue

The Spinal Cord, spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Sensory Pathways and the Somatic Nervous System

The Autonomic Nervous System and Higher-Order Functions

The Special Senses

The Endocrine System

Blood

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

Fluid, electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

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