Question 1

Most of the ventricle filling occurs ________.

Accepted Answer

A)  during atrial systole 
B)  when the AV valve is closed 
C)  during ventricular systole 
D)  during atrial diastole 
E)  during isovolumetric contraction 
A)  during atrial systole 
B)  when the AV valve is closed 
C)  during ventricular systole 
D)  during atrial diastole 
E)  during isovolumetric contraction

Question 2

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 Na+ channels. 
C)  continuing to have open Ca2+ channels. 
D)  closure of Cl− channels. 
E)  closing of Ca2+ channels. 
A)  sodium-potassium pump. 
B)  opening of Na+ channels. 
C)  continuing to have open Ca2+ channels. 
D)  closure of Cl− channels. 
E)  closing of Ca2+ channels.

Question 3

When sodium channels are fully open, the membrane of the ventricular cardiac muscle cells ________.

Accepted Answer

A)  sharply hyperpolarizes 
B)  sharply repolarizes 
C)  sharply depolarizes 
D)  plateaus 
E)  has no response 
A)  sharply hyperpolarizes 
B)  sharply repolarizes 
C)  sharply depolarizes 
D)  plateaus 
E)  has no response

Question 4

Assume that the left ventricle of a child's heart has an EDV=90mL, and ESV=60mL, and a cardiac output of 2,400 mL/min. His SV is ________ mL/beat, and his HR is ________ bpm.

Accepted Answer

A)  30; 80 
B)  40; 60 
C)  80; 30 
D)  150; 16 
E)  16; 150 
A)  30; 80 
B)  40; 60 
C)  80; 30 
D)  150; 16 
E)  16; 150

Question 5

The right side of the heart receives blood from the body and pumps through the ________ circulation to the lungs.

Accepted Answer

A)  hepatic 
B)  pulmonary 
C)  peripheral 
D)  systemic 
A)  hepatic 
B)  pulmonary 
C)  peripheral 
D)  systemic

Question 6

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 7

The ________ carry blood toward the lungs.

Accepted Answer

A)  pulmonary arteries and veins 
B)  pulmonary trunk and arteries 
C)  pulmonary trunk and veins 
D)  superior and inferior venae cavae 
E)  aorta and pulmonary arteries 
A)  pulmonary arteries and veins 
B)  pulmonary trunk and arteries 
C)  pulmonary trunk and veins 
D)  superior and inferior venae cavae 
E)  aorta and pulmonary arteries

Question 8

When the aortic semilunar valve closes and blood bounces off of it, it produces the ________ heart sound that is ultimately related to when the ________.

Accepted Answer

A)  lubb (S1); atria contract 
B)  dupp (S2); atria relax 
C)  lubb (S1); ventricles contract 
D)  dupp (S2); ventricles relax 
E)  lubb (S1); ventricles relax 
A)  lubb (S1); atria contract 
B)  dupp (S2); atria relax 
C)  lubb (S1); ventricles contract 
D)  dupp (S2); ventricles relax 
E)  lubb (S1); ventricles relax

Question 9

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 fibers. 
B)  it is in close association with the transverse tubules. 
C)  it is involved in the storage and release of Ca2+. 
D)  it has enlarged terminal cisternae like skeletal muscle fibers. 
A)  it is more irregular than that in skeletal muscle fibers. 
B)  it is in close association with the transverse tubules. 
C)  it is involved in the storage and release of Ca2+. 
D)  it has enlarged terminal cisternae like skeletal muscle fibers.

Question 10

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 11

The dicrotic notch in the aortic pressure curve is due to the

Accepted Answer

A)  increase in intraventricular pressure during ejection. 
B)  backflow of blood toward the ventricles. 
C)  closure of the left AV valve. 
D)  elasticity of the arterial wall. 
E)  closure of the semilunar valves. 
A)  increase in intraventricular pressure during ejection. 
B)  backflow of blood toward the ventricles. 
C)  closure of the left AV valve. 
D)  elasticity of the arterial wall. 
E)  closure of the semilunar valves.

Question 12

Which vessels empty blood into the left atrium?

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 13

In a normal electrocardiogram, the

Accepted Answer

A)  P wave results from repolarization of the atria. 
B)  QRS complex results from ventricular depolarization. 
C)  P wave occurs after the QRS complex but before the T wave. 
D)  T wave represents depolarization of the atria. 
E)  repolarization of the atria is clearly visible. 
A)  P wave results from repolarization of the atria. 
B)  QRS complex results from ventricular depolarization. 
C)  P wave occurs after the QRS complex but before the T wave. 
D)  T wave represents depolarization of the atria. 
E)  repolarization of the atria is clearly visible.

Question 14

The ________ valve guards the entrance to the ________, which carries ________ blood to the lungs.

Accepted Answer

A)  bicuspid; aorta; oxygenated 
B)  mitral; pulmonary trunk; oxygenated 
C)  pulmonary semilunar; pulmonary trunk; deoxygenated 
D)  aortic; aorta; deoxygenated 
A)  bicuspid; aorta; oxygenated 
B)  mitral; pulmonary trunk; oxygenated 
C)  pulmonary semilunar; pulmonary trunk; deoxygenated 
D)  aortic; aorta; deoxygenated

Question 15

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 16

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 17

The cardioregulatory center of the brain is located in the

Accepted Answer

A)  hypothalamus. 
B)  medulla oblongata. 
C)  cerebellum. 
D)  cerebrum. 
E)  diencephalons. 
A)  hypothalamus. 
B)  medulla oblongata. 
C)  cerebellum. 
D)  cerebrum. 
E)  diencephalons.

Question 18

Energy for contraction of cardiac muscle cells comes primarily from

Accepted Answer

A)  aerobic respiration in the mitochondria. 
B)  anaerobic respiration in the cytosol. 
C)  glycolysis in the cytosol. 
D)  ATP that is stored while the heart is not contracting. 
E)  creatine phosphate. 
A)  aerobic respiration in the mitochondria. 
B)  anaerobic respiration in the cytosol. 
C)  glycolysis in the cytosol. 
D)  ATP that is stored while the heart is not contracting. 
E)  creatine phosphate.

Question 19

Which statement correctly identifies the phase of the cardiac cycle that occurs when the pressure in the ventricles is lower than the pressure in the great arteries but greater than the pressure in the atria?

Accepted Answer

A)  Passive ventricular filling 
B)  Period of ejection 
C)  Period of isovolumetric contraction 
D)  Active ventricular filling 
A)  Passive ventricular filling 
B)  Period of ejection 
C)  Period of isovolumetric contraction 
D)  Active ventricular filling

Question 20

Obstruction of the ________ will cause a more severe myocardial infarction (MI) than the obstruction of any of the others.

Accepted Answer

A)  left marginal vein 
B)  left coronary artery (LC
A)  
C)  posterior interventricular vein 
D)  anterior interventricular branch 
E)  circumflex branch 
A)  left marginal vein 
B)  left coronary artery (LC
A)  
C)  posterior interventricular vein 
D)  anterior interventricular branch 
E)  circumflex branch

Exam 20: Cardiovascular System: the Heart

Most of the ventricle filling occurs ________.

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

When sodium channels are fully open, the membrane of the ventricular cardiac muscle cells ________.

Assume that the left ventricle of a child's heart has an EDV=90mL, and ESV=60mL, and a cardiac output of 2,400 mL/min. His SV is ________ mL/beat, and his HR is ________ bpm.

The right side of the heart receives blood from the body and pumps through the ________ circulation to the lungs.

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

The ________ carry blood toward the lungs.

When the aortic semilunar valve closes and blood bounces off of it, it produces the ________ heart sound that is ultimately related to when the ________.

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

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

The dicrotic notch in the aortic pressure curve is due to the

Which vessels empty blood into the left atrium?

In a normal electrocardiogram, the

The ________ valve guards the entrance to the ________, which carries ________ blood to the lungs.

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

When comparing cardiac muscle cells and skeletal muscle cells,

The cardioregulatory center of the brain is located in the

Energy for contraction of cardiac muscle cells comes primarily from

Which statement correctly identifies the phase of the cardiac cycle that occurs when the pressure in the ventricles is lower than the pressure in the great arteries but greater than the pressure in the atria?

Obstruction of the ________ will cause a more severe myocardial infarction (MI) than the obstruction of any of the others.

The Human Organism

The Chemical Basis of Life

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joint 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

Urinary System

Water, Electrolyte, and Acid-Base Balance

Reproductive System

Development, Growth, Aging, and Genetics

Filters

Assume that the left ventricle of a child's heart has an EDV=90mL, and ESV=60mL, and a cardiac output of 2,400 mL/min. His SV is mL/beat, and his HR is bpm.

When the aortic semilunar valve closes and blood bounces off of it, it produces the heart sound that is ultimately related to when the .

The valve guards the entrance to the , which carries blood to the lungs.