Question 1

What is the cause of the heart sounds "lubb-dupp"?

Accepted Answer

A)  Closing of the heart valves 
B)  Flow of blood through the coronary arteries 
C)  The electrical signal as it moves through the AV node 
D)  The firing of the autonomic nerves to the SA node 
A)  Closing of the heart valves 
B)  Flow of blood through the coronary arteries 
C)  The electrical signal as it moves through the AV node 
D)  The firing of the autonomic nerves to the SA node

Question 2

Which of the following "sees" oxygenated blood?

Accepted Answer

A)  Venae cavae 
B)  Pulmonary veins 
C)  Right atrium 
D)  Pulmonic valve 
A)  Venae cavae 
B)  Pulmonary veins 
C)  Right atrium 
D)  Pulmonic valve

Question 3

The purpose of the right heart is to pump blood

Accepted Answer

A)  to the systemic circulation. 
B)  into the aorta. 
C)  to the left anterior descending and circumflex arteries. 
D)  to the lungs for oxygenation. 
A)  to the systemic circulation. 
B)  into the aorta. 
C)  to the left anterior descending and circumflex arteries. 
D)  to the lungs for oxygenation.

Question 4

Which structure is not perfused by blood that flows from the pulmonary capillaries to the aorta?

Accepted Answer

A)  Right atrium 
B)  Aortic semilunar valve 
C)  Mitral valve 
D)  Pulmonary veins 
A)  Right atrium 
B)  Aortic semilunar valve 
C)  Mitral valve 
D)  Pulmonary veins

Question 5

Which of the following semilunar valves "sees" oxygenated blood?

Accepted Answer

A)  Mitral 
B)  Bicuspid 
C)  Aortic 
D)  Pulmonic 
A)  Mitral 
B)  Bicuspid 
C)  Aortic 
D)  Pulmonic

Question 6

Which of the following best describes a pacemaker cell?

Accepted Answer

A)  Restricted to the SA node 
B)  Spontaneous depolarization 
C)  Incapable of repolarization 
D)  Stable resting membrane potential 
A)  Restricted to the SA node 
B)  Spontaneous depolarization 
C)  Incapable of repolarization 
D)  Stable resting membrane potential

Question 7

In normal sinus rhythm (NSR),the

Accepted Answer

A)  cardiac impulse originates in the sinoatrial node. 
B)  action potential originates in the AV node. 
C)  AV node activates the SA node. 
D)  action potential is generated by the sympathetic nerve. 
A)  cardiac impulse originates in the sinoatrial node. 
B)  action potential originates in the AV node. 
C)  AV node activates the SA node. 
D)  action potential is generated by the sympathetic nerve.

Question 8

Which of the following is not true of the heart?

Accepted Answer

A)  The heart is located within the mediastinum. 
B)  The apex is located left of the sternal midline at the level of the fifth intercostal space. 
C)  The base of the heart is located at the level of the second rib. 
D)  The pericardium is composed of actin and myosin. 
A)  The heart is located within the mediastinum. 
B)  The apex is located left of the sternal midline at the level of the fifth intercostal space. 
C)  The base of the heart is located at the level of the second rib. 
D)  The pericardium is composed of actin and myosin.

Question 9

In which structure is oxygen saturation lowest?

Accepted Answer

A)  Right atrium 
B)  Pulmonary capillaries 
C)  Pulmonary veins 
D)  Left ventricle 
A)  Right atrium 
B)  Pulmonary capillaries 
C)  Pulmonary veins 
D)  Left ventricle

Question 10

Which of the following structures "sees" unoxygenated blood?

Accepted Answer

A)  Aorta 
B)  Left ventricle 
C)  Pulmonary artery 
D)  Pulmonary veins 
A)  Aorta 
B)  Left ventricle 
C)  Pulmonary artery 
D)  Pulmonary veins

Question 11

Which slinglike structure supports the heart?

Accepted Answer

A)  Pericardium 
B)  Chordae tendineae 
C)  Myocardium 
D)  Endocardium 
A)  Pericardium 
B)  Chordae tendineae 
C)  Myocardium 
D)  Endocardium

Question 12

When is coronary blood flow greatest?

Accepted Answer

A)  During ventricular contraction 
B)  Immediately following the QRS complex on the ECG 
C)  During ventricular diastole 
D)  During ventricular systole 
A)  During ventricular contraction 
B)  Immediately following the QRS complex on the ECG 
C)  During ventricular diastole 
D)  During ventricular systole

Question 13

What is the significance of elevated plasma levels of AST,CPK,and LDH?

Accepted Answer

A)  Myocardial damage as in myocardial infarction 
B)  A normal myocardial response to exercise 
C)  An increase in coronary blood flow 
D)  Early-onset exertional angina 
A)  Myocardial damage as in myocardial infarction 
B)  A normal myocardial response to exercise 
C)  An increase in coronary blood flow 
D)  Early-onset exertional angina

Question 14

Which of the following is true of the myocardium?

Accepted Answer

A)  Contains thick and thin filaments 
B)  Contains actin and myosin 
C)  Is thicker in the left ventricle than in the right ventricle 
D)  All of the above 
A)  Contains thick and thin filaments 
B)  Contains actin and myosin 
C)  Is thicker in the left ventricle than in the right ventricle 
D)  All of the above

Question 15

Both the semilunar valves

Accepted Answer

A)  are located in the left heart. 
B)  are entrance valves. 
C)  have chordae tendineae attached to their cusps. 
D)  prevent the backflow of blood from the aorta and pulmonary artery into the ventricles. 
A)  are located in the left heart. 
B)  are entrance valves. 
C)  have chordae tendineae attached to their cusps. 
D)  prevent the backflow of blood from the aorta and pulmonary artery into the ventricles.

Question 16

The heart

Accepted Answer

A)  lies within the mediastinal, thoracic, and ventral cavities. 
B)  beats only in response to stimulation by the autonomic nerves. 
C)  is located within the pleural cavity. 
D)  is located between the fifth and twelfth ribs in the left thoracic region. 
A)  lies within the mediastinal, thoracic, and ventral cavities. 
B)  beats only in response to stimulation by the autonomic nerves. 
C)  is located within the pleural cavity. 
D)  is located between the fifth and twelfth ribs in the left thoracic region.

Question 17

The correct sequence is: Blood flows from the pulmonary capillaries to the pulmonary veins to the left atrium to the left ventricle to the

Accepted Answer

A)  vena cava. 
B)  pulmonary artery. 
C)  aorta. 
D)  circle of Willis. 
A)  vena cava. 
B)  pulmonary artery. 
C)  aorta. 
D)  circle of Willis.

Question 18

Which group is incorrect?

Accepted Answer

A)  Semilunar valves: pulmonic, aortic 
B)  Atrioventricular valves: tricuspid, bicuspid, mitral 
C)  Structures that carry oxygenated blood: pulmonary veins, left ventricle, aorta 
D)  Structures that carry unoxygenated blood: right ventricle, venae cavae, pulmonary veins 
A)  Semilunar valves: pulmonic, aortic 
B)  Atrioventricular valves: tricuspid, bicuspid, mitral 
C)  Structures that carry oxygenated blood: pulmonary veins, left ventricle, aorta 
D)  Structures that carry unoxygenated blood: right ventricle, venae cavae, pulmonary veins

Question 19

Into what structure does blood reflux as a consequence of an incompetent aortic semilunar valve?

Accepted Answer

A)  Right atrium 
B)  Circumflex artery 
C)  Left ventricle 
D)  Pulmonary artery 
A)  Right atrium 
B)  Circumflex artery 
C)  Left ventricle 
D)  Pulmonary artery

Question 20

What is the name of the valve that prevents backflow of blood into the right atrium when the right ventricle contracts?

Accepted Answer

A)  Mitral 
B)  Pulmonic 
C)  Semilunar 
D)  Tricuspid 
A)  Mitral 
B)  Pulmonic 
C)  Semilunar 
D)  Tricuspid

Exam 16: Anatomy of the Heart

What is the cause of the heart sounds "lubb-dupp"?

Which of the following "sees" oxygenated blood?

The purpose of the right heart is to pump blood

Which structure is not perfused by blood that flows from the pulmonary capillaries to the aorta?

Which of the following semilunar valves "sees" oxygenated blood?

Which of the following best describes a pacemaker cell?

In normal sinus rhythm (NSR),the

Which of the following is not true of the heart?

In which structure is oxygen saturation lowest?

Which of the following structures "sees" unoxygenated blood?

Which slinglike structure supports the heart?

When is coronary blood flow greatest?

What is the significance of elevated plasma levels of AST,CPK,and LDH?

Which of the following is true of the myocardium?

Both the semilunar valves

The heart

The correct sequence is: Blood flows from the pulmonary capillaries to the pulmonary veins to the left atrium to the left ventricle to the

Which group is incorrect?

Into what structure does blood reflux as a consequence of an incompetent aortic semilunar valve?

What is the name of the valve that prevents backflow of blood into the right atrium when the right ventricle contracts?

Introduction to the Human Body

Basic Chemistry

Cells

Cell Metabolism

Microbiology Basics

Tissues and Membranes

Integumentary System and Body Temperature

Skeletal System

Muscular System

Nervous System: Nervous Tissue and Brain

Nervous System: Spinal Cord and Peripheral Nerves

Autonomic Nervous System

Sensory System

Endocrine System

Blood

Function of the Heart

Anatomy of the Blood Vessels

Functions of the Blood Vessels

Lymphatic System

Immune System

Respiratory System

Digestive System

Urinary System

Water, Electrolyte, and Acid-Base Balance

Reproductive Systems

Human Development and Heredity

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