Question 1

When comparing cardiac muscle cells and skeletal muscle cells,

Accepted Answer

A)  the rate of action potential propagation is faster in cardiac muscle. 
B)  both possess intercalated discs. 
C)  only skeletal muscle has a plateau phase in its contraction cycle. 
D)  action potentials are conducted from cell to cell only in cardiac muscle. 
E)  both are voluntary. 
A)  the rate of action potential propagation is faster in cardiac muscle. 
B)  both possess intercalated discs. 
C)  only skeletal muscle has a plateau phase in its contraction cycle. 
D)  action potentials are conducted from cell to cell only in cardiac muscle. 
E)  both are voluntary.

Question 2

Which of the following sequences for the conducting system is correct?

Accepted Answer

A)  AV node, AV bundle, SA node, Purkinje fibers, bundle branches 
B)  Purkinje fibers, bundle branches, AV node, AV bundle, SA node 
C)  SA node, AV node, AV bundle, bundle branches, Purkinje fibers 
D)  SA node, AV bundle, AV node, bundle branches, Purkinje fibers 
E)  AV node, SA node, bundle branches, AV bundle, Purkinje fibers 
A)  AV node, AV bundle, SA node, Purkinje fibers, bundle branches 
B)  Purkinje fibers, bundle branches, AV node, AV bundle, SA node 
C)  SA node, AV node, AV bundle, bundle branches, Purkinje fibers 
D)  SA node, AV bundle, AV node, bundle branches, Purkinje fibers 
E)  AV node, SA node, bundle branches, AV bundle, Purkinje fibers

Question 3

Which of the following is NOT a function of the heart?

Accepted Answer

A)  providing a location for gas exchange between oxygen and carbon dioxide 
B)  regulating blood supply to tissues depending on need 
C)  generating blood pressure through contraction 
D)  routing blood to either the pulmonary or systemic circulations 
A)  providing a location for gas exchange between oxygen and carbon dioxide 
B)  regulating blood supply to tissues depending on need 
C)  generating blood pressure through contraction 
D)  routing blood to either the pulmonary or systemic circulations

Question 4

Which of the following heart chambers is correctly associated with the blood vessel that enters or leaves it?

Accepted Answer

A)  right atrium - pulmonary veins 
B)  left atrium - aorta 
C)  right ventricle - pulmonary trunk 
D)  left ventricle - superior vena cava and inferior vena cava 
E)  right atrium - aorta 
A)  right atrium - pulmonary veins 
B)  left atrium - aorta 
C)  right ventricle - pulmonary trunk 
D)  left ventricle - superior vena cava and inferior vena cava 
E)  right atrium - aorta

Question 5

The product of the stroke volume times the heart rate is known as the

Accepted Answer

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

Question 6

The chordae tendineae

Accepted Answer

A)  connect the atria to the ventricles. 
B)  are found in the interventricular septum. 
C)  are part of the conducting system of the heart. 
D)  connect the flaps of the AV valves to the papillary muscles. 
E)  are a part of the myocardium. 
A)  connect the atria to the ventricles. 
B)  are found in the interventricular septum. 
C)  are part of the conducting system of the heart. 
D)  connect the flaps of the AV valves to the papillary muscles. 
E)  are a part of the myocardium.

Question 7

Which of the following will depolarize immediately after the AV node depolarizes?

Accepted Answer

A)  the AV bundle 
B)  Purkinje fibers 
C)  atrial myocardium 
D)  bundle branches in the ventricular septum 
E)  the SA node 
A)  the AV bundle 
B)  Purkinje fibers 
C)  atrial myocardium 
D)  bundle branches in the ventricular septum 
E)  the SA node

Question 8

All of the following characteristics of the sarcoplasmic reticulum in cardiac muscle cells are true except ________________.

Accepted Answer

A)  it is more irregular than that in skeletal muscle cells. 
B)  it is in close association wit the transverse tubules. 
C)  it is involved in the storage and release of calcium 
D)  it has enlarged terminal cisternae like skeletal muscle cells. 
A)  it is more irregular than that in skeletal muscle cells. 
B)  it is in close association wit the transverse tubules. 
C)  it is involved in the storage and release of calcium 
D)  it has enlarged terminal cisternae like skeletal muscle cells.

Question 9

A stab wound into the heart can result in cardiac tamponade. This means that

Accepted Answer

A)  blood enters the pleural cavity. 
B)  the heart is compressed by blood in the pericardial sac. 
C)  the electrical conduction system of the heart is damaged. 
D)  the left coronary artery has been damaged or cut. 
E)  the heart has lost all of its blood. 
A)  blood enters the pleural cavity. 
B)  the heart is compressed by blood in the pericardial sac. 
C)  the electrical conduction system of the heart is damaged. 
D)  the left coronary artery has been damaged or cut. 
E)  the heart has lost all of its blood.

Question 10

Baroreceptor reflexes

Accepted Answer

A)  are triggered by increased blood osmolality. 
B)  correct changes in blood pH. 
C)  do not impact the activity of the heart. 
D)  are of minor importance in humans. 
E)  can change heart rate. 
A)  are triggered by increased blood osmolality. 
B)  correct changes in blood pH. 
C)  do not impact the activity of the heart. 
D)  are of minor importance in humans. 
E)  can change heart rate.

Question 11

In a physiology lab, the students designed an experiment to illustrate how the heart responds to changes in blood pressure. Everyone relaxed and then did a headstand. Which of the following observations are consistent with the change in the function of their hearts?

Accepted Answer

A)  increased heart rate 
B)  decreased heart rate 
C)  increased stroke volume 
D)  decreased stroke volume 
E)  both decreased heart rate and increased stroke volume 
A)  increased heart rate 
B)  decreased heart rate 
C)  increased stroke volume 
D)  decreased stroke volume 
E)  both decreased heart rate and increased stroke volume

Question 12

The "pacemaker" of the heart is the

Accepted Answer

A)  right bundle branch. 
B)  left bundle branch. 
C)  AV node. 
D)  SA node. 
E)  PM node. 
A)  right bundle branch. 
B)  left bundle branch. 
C)  AV node. 
D)  SA node. 
E)  PM node.

Question 13

Diagnostic tests done on a patient show that many coronary arteries, including the left main coronary artery are severely narrowed. Which of the following is the best course of action to treat this patient?

Accepted Answer

A)  Angiogram 
B)  Angioplasty 
C)  Coronary bypass surgery 
D)  Electrocardiogram 
E)  Urokinase injections 
A)  Angiogram 
B)  Angioplasty 
C)  Coronary bypass surgery 
D)  Electrocardiogram 
E)  Urokinase injections

Question 14

A patient has been diagnosed with mild heart disease. Tests show that some of the coronary arteries are partially occluded. Which of the following is the best course of action to treat the disease?

Accepted Answer

A)  Angioplasty 
B)  Coronary bypass surgery 
C)  Electrocardiogram 
D)  Tissue plasminogen activation 
E)  Angiogram 
A)  Angioplasty 
B)  Coronary bypass surgery 
C)  Electrocardiogram 
D)  Tissue plasminogen activation 
E)  Angiogram

Question 15

Coronary artery disease can diminish myocardial blood flow resulting in the death of myocardial cells. This condition is known as a myocardial

Accepted Answer

A)  attack. 
B)  angina. 
C)  necrosis. 
D)  cirrhosis. 
E)  infarction. 
A)  attack. 
B)  angina. 
C)  necrosis. 
D)  cirrhosis. 
E)  infarction.

Question 16

Which of the following will increase the heart rate?

Accepted Answer

A)  a rise in pH 
B)  an increase in the level of carbon dioxide in the blood 
C)  an increase in the level of blood oxygen 
D)  an increase in blood pressure 
E)  a decrease in the level of carbon dioxide in the blood 
A)  a rise in pH 
B)  an increase in the level of carbon dioxide in the blood 
C)  an increase in the level of blood oxygen 
D)  an increase in blood pressure 
E)  a decrease in the level of carbon dioxide in the blood

Question 17

Which blood vessel carries blood from the left ventricle?

Accepted Answer

A)  aorta 
B)  right atrium 
C)  pulmonary trunk 
D)  pulmonary arteries 
E)  pulmonary veins 
A)  aorta 
B)  right atrium 
C)  pulmonary trunk 
D)  pulmonary arteries 
E)  pulmonary veins

Question 18

The plateau phase seen during the action potential of a cardiac muscle cell is due to the

Accepted Answer

A)  sodium-potassium pump. 
B)  opening of sodium channels. 
C)  continuing to have open calcium channels. 
D)  closure of chloride channels. 
E)  closing of calcium channels. 
A)  sodium-potassium pump. 
B)  opening of sodium channels. 
C)  continuing to have open calcium channels. 
D)  closure of chloride channels. 
E)  closing of calcium channels.

Question 19

What vessel exits the left ventricle?

Accepted Answer

A)  pulmonary trunk 
B)  pulmonary vein 
C)  aorta 
D)  pulmonary artery 
A)  pulmonary trunk 
B)  pulmonary vein 
C)  aorta 
D)  pulmonary artery

Exam 20: Cardiovascular System: the Heart

When comparing cardiac muscle cells and skeletal muscle cells,

Which of the following sequences for the conducting system is correct?

Which of the following is NOT a function of the heart?

Which of the following heart chambers is correctly associated with the blood vessel that enters or leaves it?

The product of the stroke volume times the heart rate is known as the

The chordae tendineae

Which of the following will depolarize immediately after the AV node depolarizes?

All of the following characteristics of the sarcoplasmic reticulum in cardiac muscle cells are true except ________________.

A stab wound into the heart can result in cardiac tamponade. This means that

Baroreceptor reflexes

In a physiology lab, the students designed an experiment to illustrate how the heart responds to changes in blood pressure. Everyone relaxed and then did a headstand. Which of the following observations are consistent with the change in the function of their hearts?

The "pacemaker" of the heart is the

Diagnostic tests done on a patient show that many coronary arteries, including the left main coronary artery are severely narrowed. Which of the following is the best course of action to treat this patient?

A patient has been diagnosed with mild heart disease. Tests show that some of the coronary arteries are partially occluded. Which of the following is the best course of action to treat the disease?

Coronary artery disease can diminish myocardial blood flow resulting in the death of myocardial cells. This condition is known as a myocardial

Which of the following will increase the heart rate?

Which blood vessel carries blood from the left ventricle?

The plateau phase seen during the action potential of a cardiac muscle cell is due to the

What vessel exits the left ventricle?

The Human Organism

The Chemical Basis of Life

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joints and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Functional Organization of Nervous Tissue

Spinal Cord and Spinal Nerves

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Temperature Regulation

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Water, Electrolyte, and Acid-Based Balance

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