Question 1

Which of the following is not true of the atria?

Accepted Answer

A) They have thinner myocardial walls than do ventricles. 
B) They are the same structure as the auricle. 
C) They are called receiving chambers of the heart. 
D) All of the above are true of the atria. 
A) They have thinner myocardial walls than do ventricles. 
B) They are the same structure as the auricle. 
C) They are called receiving chambers of the heart. 
D) All of the above are true of the atria.

Question 2

Endothelial cells are the only structures found in all parts of the circulatory system.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following is true of the conduction system of the heart?

Accepted Answer

A) It is made of cardiac muscle. 
B) It is made of nervous tissue. 
C) It continues its contractile roll even while conducting an impulse. 
D) Both A and C are true of the conduction system of the heart. 
A) It is made of cardiac muscle. 
B) It is made of nervous tissue. 
C) It continues its contractile roll even while conducting an impulse. 
D) Both A and C are true of the conduction system of the heart.

Question 4

What is the functional significance of large areas of cardiac muscle being electrically coupled to form a single functional syncytium?

Accepted Answer

A) Because they form a syncytium, cardiac muscles can contract on their own. 
B) Because they form a syncytium, muscle cells can pass an action potential along a large area of the heart wall, stimulating contraction in each muscle fiber of the syncytium. 
C) Because they form a syncytium, muscle cells cannot summate contraction to produce tetanus, and thus do not fatigue. 
D) Because they form a syncytium, cardiac muscle cells can pass an action potential by way of internodal bundles contracting both atrial chambers. 
A) Because they form a syncytium, cardiac muscles can contract on their own. 
B) Because they form a syncytium, muscle cells can pass an action potential along a large area of the heart wall, stimulating contraction in each muscle fiber of the syncytium. 
C) Because they form a syncytium, muscle cells cannot summate contraction to produce tetanus, and thus do not fatigue. 
D) Because they form a syncytium, cardiac muscle cells can pass an action potential by way of internodal bundles contracting both atrial chambers.

Question 5

If today is your twenty-third birthday, your heart has been beating for more than 23 years.

Accepted Answer

A) True 
 B)False

Question 6

The heart is autorhythmic, which means it can generate its own action potential without outside nerve stimulation.

Accepted Answer

A) True 
 B)False

Question 7

The pulmonary and aortic valves are also called _____ valves.

Accepted Answer

A) cuspid 
B) semilunar 
C) aortic 
D) pulmonary 
A) cuspid 
B) semilunar 
C) aortic 
D) pulmonary

Question 8

The general function of both sets of valves in the heart is to prevent blood from flowing back to the chamber it just left.

Accepted Answer

A) True 
 B)False

Question 9

Name, describe, and give the function of the heart coverings.

Accepted Answer

The heart coverings, also known as the p

Question 10

The pulmonary arteries carry blood to the:

Accepted Answer

A) lungs. 
B) left atrium. 
C) right atrium. 
D) None of the above are correct. 
A) lungs. 
B) left atrium. 
C) right atrium. 
D) None of the above are correct.

Question 11

The pacemaker of the heart is the SA node.

Accepted Answer

A) True 
 B)False

Question 12

In both the atria and ventricles, the first cells to depolarize are also the first cells to repolarize.

Accepted Answer

A) True 
 B)False

Question 13

Match each term related to heart circulation with its corresponding location or description.
-Blood vessel into which the right ventricle pumps blood through a semilunar valve

Accepted Answer

A) Right ventricle 
B) Right atrium 
C) Left atrium 
D) Left ventricle 
E) Right atrioventricular valve
F)Left atrioventricular valve
G)Aortic semilunar valve
H)Pulmonary semilunar valve
I)Superior vena cava
J)Aorta
K)Pulmonary vein
L)Pulmonary artery 
A) Right ventricle 
B) Right atrium 
C) Left atrium 
D) Left ventricle 
E) Right atrioventricular valve
F)Left atrioventricular valve
G)Aortic semilunar valve
H)Pulmonary semilunar valve
I)Superior vena cava
J)Aorta
K)Pulmonary vein
L)Pulmonary artery

Question 14

The conduction system of the heart is composed of specialized motor neurons that are embedded in the heart muscle.

Accepted Answer

A) True 
 B)False

Question 15

Pacemaker cells in the heart possess intrinsic rhythm.

Accepted Answer

A) True 
 B)False

Question 16

As compared with the body's own heart pacemaker, what is the major disadvantage of a mechanical pacemaker?

Accepted Answer

A mechanical pacemaker, also known as an

Question 17

Match each ECG wave or complex with the corresponding action in the cardiac cycle.
-Atrial depolarization

Accepted Answer

A) QRS complex 
B) P wave 
C) T wave 
D) U wave 
A) QRS complex 
B) P wave 
C) T wave 
D) U wave

Question 18

Congestive heart failure causes fluid to accumulate in the lung due to the inability of the right side of the heart to generate a forceful contraction.

Accepted Answer

A) True 
 B)False

Question 19

Under resting conditions, the SA node fires at an intrinsic rhythmical rate of 80 to 85 beats per minute.

Accepted Answer

A) True 
 B)False

Question 20

The terms atria and auricle mean the same thing.

Accepted Answer

A) True 
 B)False

Exam 28: Heart

Which of the following is not true of the atria?

Endothelial cells are the only structures found in all parts of the circulatory system.

Which of the following is true of the conduction system of the heart?

What is the functional significance of large areas of cardiac muscle being electrically coupled to form a single functional syncytium?

If today is your twenty-third birthday, your heart has been beating for more than 23 years.

The heart is autorhythmic, which means it can generate its own action potential without outside nerve stimulation.

The pulmonary and aortic valves are also called _____ valves.

The general function of both sets of valves in the heart is to prevent blood from flowing back to the chamber it just left.

Name, describe, and give the function of the heart coverings.

The pulmonary arteries carry blood to the:

The pacemaker of the heart is the SA node.

In both the atria and ventricles, the first cells to depolarize are also the first cells to repolarize.

Match each term related to heart circulation with its corresponding location or description. -Blood vessel into which the right ventricle pumps blood through a semilunar valve

The conduction system of the heart is composed of specialized motor neurons that are embedded in the heart muscle.

Pacemaker cells in the heart possess intrinsic rhythm.

As compared with the body's own heart pacemaker, what is the major disadvantage of a mechanical pacemaker?

Match each ECG wave or complex with the corresponding action in the cardiac cycle. -Atrial depolarization

Congestive heart failure causes fluid to accumulate in the lung due to the inability of the right side of the heart to generate a forceful contraction.

Under resting conditions, the SA node fires at an intrinsic rhythmical rate of 80 to 85 beats per minute.

The terms atria and auricle mean the same thing.

Organization of the Body

Homeostasis

Chemistry of Life

Biomolecules

Cell Structure

Cell Function

Cell Growth and Development

Introduction to Tissues

Tissue Types

Skin

Skeletal Tissues

Axial Skeleton

Appendicular Skeleton

Articulations

Axial Muscles

Appendicular Muscles

Muscle Contraction

Nervous System Cells

Nerve Signaling

Central Nervous System

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Autonomic Nervous System

General Senses

Special Senses

Endocrine Regulation

Endocrine Glands

Blood

Blood Vessels

Circulation of the Blood

Lymphatic System

Innate Immunity

Adaptive Immunity

Stress

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Gas Exchange Transport

Upper Digestive Tract

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Digestion and Absorption

Nutrition and Metabolism

Urinary System

Fluid and Electrolyte Balance

Acid-Base Balance

Male Reproductive System

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Growth, Development, and Aging

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