Question 1

What produces the "lub dub" heart sounds?

Accepted Answer

A)  the vibrations of the ventricular and blood vessel walls when valves shut 
B)  the sound of blood traveling through the heart 
C)  the relaxation of the atria, and then the ventricles 
D)  the contraction of the atria, and then the ventricles 
A)  the vibrations of the ventricular and blood vessel walls when valves shut 
B)  the sound of blood traveling through the heart 
C)  the relaxation of the atria, and then the ventricles 
D)  the contraction of the atria, and then the ventricles A

Question 2

Predict the position of the valves when the ventricles contract.

Accepted Answer

A)  Both AV valves and semilunar valves are forced shut. 
B)  Both AV valves are forced open while both semilunar valves are forced shut. 
C)  Both AV valves and semilunar valves are forced open. 
D)  Both AV valves are forced shut while both semilunar valves are forced open. 
A)  Both AV valves and semilunar valves are forced shut. 
B)  Both AV valves are forced open while both semilunar valves are forced shut. 
C)  Both AV valves and semilunar valves are forced open. 
D)  Both AV valves are forced shut while both semilunar valves are forced open. D

Question 3

What normally serves as the pacemaker of the entire heart?

Accepted Answer

A)  Purkinje fiber system 
B)  atrioventricular (AV) node 
C)  sinoatrial (S
A)  node 
D)  atrioventricular (AV) bundle 
A)  Purkinje fiber system 
B)  atrioventricular (AV) node 
C)  sinoatrial (S
A)  node 
D)  atrioventricular (AV) bundle C

Question 4

Afterload is described as:

Accepted Answer

A)  the force the ventricles must overcome to eject blood into their respective arteries. 
B)  the ability to generate tension. 
C)  the length or degree of stretch of the sarcomeres in the ventricular cells before they contract. 
D)  the amount of blood that has drained into the ventricle by the end of the filling phase. 
A)  the force the ventricles must overcome to eject blood into their respective arteries. 
B)  the ability to generate tension. 
C)  the length or degree of stretch of the sarcomeres in the ventricular cells before they contract. 
D)  the amount of blood that has drained into the ventricle by the end of the filling phase.

Question 5

The length of the cardiac action potential, at 200 -300 msec, is dependent upon the:

Accepted Answer

A)  initial repolarization phase. 
B)  repolarization phase. 
C)  plateau phase. 
D)  rapid depolarization phase. 
A)  initial repolarization phase. 
B)  repolarization phase. 
C)  plateau phase. 
D)  rapid depolarization phase.

Question 6

End -diastolic volume for each ventricle during rest is normally about:

Accepted Answer

A)  120 ml. 
B)  25 ml. 
C)  50 ml. 
D)  70 ml. 
A)  120 ml. 
B)  25 ml. 
C)  50 ml. 
D)  70 ml.

Question 7

What vessel(s) deliver oxygenated blood to the left atrium?

Accepted Answer

A)  pulmonary arteries 
B)  pulmonary trunk 
C)  pulmonary veins 
D)  aorta 
A)  pulmonary arteries 
B)  pulmonary trunk 
C)  pulmonary veins 
D)  aorta

Question 8

Blood in the right atrium should travel next past the:

Accepted Answer

A)  tricuspid valve and into the right ventricle. 
B)  pulmonary trunk to the pulmonary capillaries. 
C)  pulmonary valve and into the pulmonary trunk. 
D)  mitral valve and into the left ventricle. 
A)  tricuspid valve and into the right ventricle. 
B)  pulmonary trunk to the pulmonary capillaries. 
C)  pulmonary valve and into the pulmonary trunk. 
D)  mitral valve and into the left ventricle.

Question 9

The right and left atria depolarize and contract following the arrival of the action potential from the:

Accepted Answer

A)  atrioventricular (AV) node. 
B)  Purkinje fibers. 
C)  sinoatrial (S
A)  node. 
D)  atrioventricular (AV) bundle. 
A)  atrioventricular (AV) node. 
B)  Purkinje fibers. 
C)  sinoatrial (S
A)  node. 
D)  atrioventricular (AV) bundle.

Question 10

Which of the following pacemaker cell populations has the fastest intrinsic rate of depolarization at about 60 times per minute?

Accepted Answer

A)  atrioventricular (AV) node 
B)  Purkinje fiber system 
C)  sinoatrial (S
A)  node 
D)  atrioventricular (AV) bundle 
A)  atrioventricular (AV) node 
B)  Purkinje fiber system 
C)  sinoatrial (S
A)  node 
D)  atrioventricular (AV) bundle

Question 11

Match the following with the waves, segments, or intervals on the electrocardiogram (ECG).
  
-Identify the interval during which the ventricles are undergoing action potentials.

Accepted Answer

The answer of Match the following with the waves, segments,...

Question 12

Discuss the chronotropic effects of the sympathetic and parasympathetic nervous systems on the heart.

Accepted Answer

The sympathetic nervous system releases

Question 13

Discuss the five waves seen on an electrocardiogram (ECG) and explain what they represent.

Accepted Answer

The five waves seen on an electrocardiog

Question 14

Match the following with the waves, segments, or intervals on the electrocardiogram (ECG).
  
-Identify the complex representing ventricular depolarization.

Accepted Answer

The answer of Match the following with the waves, segments,...

Question 15

How much blood is pumped from each ventricle during the ventricular ejection phase?

Accepted Answer

A)  120 ml 
B)  90 ml 
C)  70 ml 
D)  50 ml 
A)  120 ml 
B)  90 ml 
C)  70 ml 
D)  50 ml

Question 16

The amount of blood remaining in each ventricle at the end of the ventricular ejection phase is normally about:

Accepted Answer

A)  120 ml. 
B)  70 ml. 
C)  50 ml. 
D)  30 ml. 
A)  120 ml. 
B)  70 ml. 
C)  50 ml. 
D)  30 ml.

Question 17

What valve prevents the backflow of blood from the right ventricle into the right atrium?

Accepted Answer

A)  right atrioventricular valve (tricuspid valve) 
B)  pulmonary valve 
C)  aortic valve 
D)  left atrioventricular valve (mitral or bicuspid valve) 
A)  right atrioventricular valve (tricuspid valve) 
B)  pulmonary valve 
C)  aortic valve 
D)  left atrioventricular valve (mitral or bicuspid valve)

Question 18

Which chamber experiences a maximum pressure of around 118 mm Hg during contraction?

Accepted Answer

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

Question 19

A contractile cell with a membrane potential of 0 mV is experiencing the:

Accepted Answer

A)  initial repolarization phase. 
B)  repolarization phase. 
C)  rapid depolarization phase. 
D)  plateau phase. 
A)  initial repolarization phase. 
B)  repolarization phase. 
C)  rapid depolarization phase. 
D)  plateau phase.

Question 20

Determine the effects to blood flow if a heart attack has caused damaged to the left side of the heart.

Accepted Answer

The left side of the heart, often called

Exam 17: The Cardiovascular System I: the Heart

What produces the "lub dub" heart sounds?

Predict the position of the valves when the ventricles contract.

What normally serves as the pacemaker of the entire heart?

Afterload is described as:

The length of the cardiac action potential, at 200 -300 msec, is dependent upon the:

End -diastolic volume for each ventricle during rest is normally about:

What vessel(s) deliver oxygenated blood to the left atrium?

Blood in the right atrium should travel next past the:

The right and left atria depolarize and contract following the arrival of the action potential from the:

Which of the following pacemaker cell populations has the fastest intrinsic rate of depolarization at about 60 times per minute?

Match the following with the waves, segments, or intervals on the electrocardiogram (ECG). -Identify the interval during which the ventricles are undergoing action potentials.

Discuss the chronotropic effects of the sympathetic and parasympathetic nervous systems on the heart.

Discuss the five waves seen on an electrocardiogram (ECG) and explain what they represent.

Match the following with the waves, segments, or intervals on the electrocardiogram (ECG). -Identify the complex representing ventricular depolarization.

How much blood is pumped from each ventricle during the ventricular ejection phase?

The amount of blood remaining in each ventricle at the end of the ventricular ejection phase is normally about:

What valve prevents the backflow of blood from the right ventricle into the right atrium?

Which chamber experiences a maximum pressure of around 118 mm Hg during contraction?

A contractile cell with a membrane potential of 0 mV is experiencing the:

Determine the effects to blood flow if a heart attack has caused damaged to the left side of the heart.

Introduction to Anatomy Physiology

The Chemistry of Life

The Cell

Histology

The Integumentary System

Bones and Bone Tissue

The Skeletal System

Articulations

The Muscular System

Muscle Tissue Physiology

Introduction to the Nervous System Nervous Tissue

The Central Nervous System

The Peripheral Nervous System

The Autonomic Nervous System Homeostasis

The Special Senses

The Endocrine System

The Cardiovascular System Ii: Blood Vessels

Blood

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The Respiratory System

The Digestive System

Metabolism Nutrition

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Fluid, Electrolyte Acid-Base Homeostasis

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The length of the cardiac action potential, at 200 ^-300 msec, is dependent upon the:

End ^-diastolic volume for each ventricle during rest is normally about: