Question 1

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 2

The Purkinje fibers

Accepted Answer

A) open valves. 
B) pull on the cusps of the valves. 
C) conduct electrical signals throughout the ventricles. 
D) close valves. 
A) open valves. 
B) pull on the cusps of the valves. 
C) conduct electrical signals throughout the ventricles. 
D) close valves.

Question 3

The correct sequence is: Blood flows from the right atrium to the right ventricle to the pulmonary artery to the

Accepted Answer

A) pulmonary veins. 
B) coronary arteries. 
C) pulmonary capillaries. 
D) vena cava. 
A) pulmonary veins. 
B) coronary arteries. 
C) pulmonary capillaries. 
D) vena cava.

Question 4

Which group is incorrect?

Accepted Answer

A) Atrioventricular valves: tricuspid,bicuspid,mitral 
B) Layers of the heart: epicardium,myocardium,endocardium 
C) Abnormal heart rates: tachycardia,bradycardia 
D) Parts of the conduction system: SA node,AV node,bundle of His,Purkinje fibers,medulla oblongata 
A) Atrioventricular valves: tricuspid,bicuspid,mitral 
B) Layers of the heart: epicardium,myocardium,endocardium 
C) Abnormal heart rates: tachycardia,bradycardia 
D) Parts of the conduction system: SA node,AV node,bundle of His,Purkinje fibers,medulla oblongata

Question 5

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 6

A vessel(s) that carry(ies) blood from the pulmonary capillaries to the left atrium is (are) the

Accepted Answer

A) aorta. 
B) pulmonary artery. 
C) pulmonary veins. 
D) vena cava. 
A) aorta. 
B) pulmonary artery. 
C) pulmonary veins. 
D) vena cava.

Question 7

Which of the following is true regarding the mediastinum?

Accepted Answer

A) It is located within the pleural cavity. 
B) The lungs are located within the mediastinum. 
C) The mediastinum is located to the right of the midline of the sternum. 
D) The mediastinum is a space between the lungs. 
A) It is located within the pleural cavity. 
B) The lungs are located within the mediastinum. 
C) The mediastinum is located to the right of the midline of the sternum. 
D) The mediastinum is a space between the lungs.

Question 8

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 9

What causes S₁ and S₂?

Accepted Answer

A) Closure of heart valves 
B) Firing of the SA node 
C) Opening of heart valves 
D) Movement of the cardiac impulse along the His-Purkinje fibers 
A) Closure of heart valves 
B) Firing of the SA node 
C) Opening of heart valves 
D) Movement of the cardiac impulse along the His-Purkinje fibers

Question 10

Where does the cardiac action potential (cardiac impulse) normally originate?

Accepted Answer

A) AV node 
B) Purkinje fibers 
C) Ectopic focus 
D) SA node 
A) AV node 
B) Purkinje fibers 
C) Ectopic focus 
D) SA node

Question 11

Which of the following is most related to "lubb" (of the lubb-dupp duo)?

Accepted Answer

A) Called S₁ 
B) Caused by the closure of the AV valves 
C) Occurs in response to ventricular contraction 
D) All of the above 
A) Called S₁ 
B) Caused by the closure of the AV valves 
C) Occurs in response to ventricular contraction 
D) All of the above

Question 12

Which of the following spaces is not related to the heart?

Accepted Answer

A) Thoracic cavity 
B) Pericardial cavity 
C) Dorsal cavity 
D) Mediastinum 
A) Thoracic cavity 
B) Pericardial cavity 
C) Dorsal cavity 
D) Mediastinum

Question 13

Which of the following supplies oxygenated blood to the heart muscle?

Accepted Answer

A) Coronary arteries 
B) Pulmonary artery 
C) Pulmonary veins 
D) Cardiac veins 
A) Coronary arteries 
B) Pulmonary artery 
C) Pulmonary veins 
D) Cardiac veins

Question 14

Which of the following is located between the visceral and parietal pericardium?

Accepted Answer

A) The mediastinum 
B) A space that contains serous fluid 
C) The precordium 
D) The endocardium 
A) The mediastinum 
B) A space that contains serous fluid 
C) The precordium 
D) The endocardium

Question 15

Which of the following is a function of a valve?

Accepted Answer

A) Regulates the direction of blood flow through the heart 
B) Regulates the amount of oxygen bound to hemoglobin 
C) Regulates heart rate 
D) Directs the movement of the cardiac impulse 
A) Regulates the direction of blood flow through the heart 
B) Regulates the amount of oxygen bound to hemoglobin 
C) Regulates heart rate 
D) Directs the movement of the cardiac impulse

Question 16

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

Question 17

Which of the following best indicates why the left ventricular myocardium is thicker than the right ventricular myocardium?

Accepted Answer

A) Ventricular oxygen saturation is greater in the left ventricle. 
B) The left ventricle works harder than the right ventricle. 
C) The aortic valve is narrower than the pulmonic valve. 
D) Left ventricular volume is less than right ventricular volume. 
A) Ventricular oxygen saturation is greater in the left ventricle. 
B) The left ventricle works harder than the right ventricle. 
C) The aortic valve is narrower than the pulmonic valve. 
D) Left ventricular volume is less than right ventricular volume.

Question 18

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 19

The aorta receives blood from the

Accepted Answer

A) right ventricle. 
B) pulmonary veins. 
C) pulmonary artery. 
D) left ventricle. 
A) right ventricle. 
B) pulmonary veins. 
C) pulmonary artery. 
D) left ventricle.

Question 20

What are the two phases of the ventricular action potential (cardiac impulse)?

Accepted Answer

A) Systole and diastole 
B) Filling and ejecting 
C) Depolarization and repolarization 
D) P wave and T wave 
A) Systole and diastole 
B) Filling and ejecting 
C) Depolarization and repolarization 
D) P wave and T wave

Exam 16: Anatomy of the Heart

Which of the following is not true of the heart?

The Purkinje fibers

The correct sequence is: Blood flows from the right atrium to the right ventricle to the pulmonary artery to the

Which group is incorrect?

Which of the following best describes a pacemaker cell?

A vessel(s) that carry(ies) blood from the pulmonary capillaries to the left atrium is (are) the

Which of the following is true regarding the mediastinum?

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

What causes S₁ and S₂?

Where does the cardiac action potential (cardiac impulse) normally originate?

Which of the following is most related to "lubb" (of the lubb-dupp duo)?

Which of the following spaces is not related to the heart?

Which of the following supplies oxygenated blood to the heart muscle?

Which of the following is located between the visceral and parietal pericardium?

Which of the following is a function of a valve?

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

Which of the following best indicates why the left ventricular myocardium is thicker than the right ventricular myocardium?

Which slinglike structure supports the heart?

The aorta receives blood from the

What are the two phases of the ventricular action potential (cardiac impulse)?

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 and Special Circulations

Functions of the Blood Vessels

Lymphatic System

Immune System

Respiratory System

Digestive System

Urinary System

Water, Electrolyte, and Acidbase Balance

Reproductive Systems

Human Development and Heredity

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