Question 1

-Blood exits this chamber when it passes through the tricuspid valve.

Accepted Answer

The answer of  
-Blood exits this chamber when it...

Question 2

-The figure illustrates the cardiac action potential. What does "C" represent?

Accepted Answer

A)  early repolarization phase 
B)  plateau phase 
C)  final repolarization phase 
D)  depolarization phase 
A)  early repolarization phase 
B)  plateau phase 
C)  final repolarization phase 
D)  depolarization phase

Question 3

Match the blood vessel with the appropriate description.
-inferior vena cava

Accepted Answer

A) returns blood to the heart from the lower extremities 
B) returns blood to the heart from the lungs 
C) carries blood from the left ventricle into systemic circulation 
D) returns blood to the heart from the head and neck 
E) carries blood from the right ventricle to the lungs 
A) returns blood to the heart from the lower extremities 
B) returns blood to the heart from the lungs 
C) carries blood from the left ventricle into systemic circulation 
D) returns blood to the heart from the head and neck 
E) carries blood from the right ventricle to the lungs

Question 4

Which of the following factors would cause an increase in heart rate?

Accepted Answer

A)  increased parasympathetic stimulation 
B)  stimulation of baroreceptors in the aorta 
C)  increased epinephrine release from the adrenal medulla 
D)  increased production of atrial natriuretic factor 
E)  vagal stimulation 
A)  increased parasympathetic stimulation 
B)  stimulation of baroreceptors in the aorta 
C)  increased epinephrine release from the adrenal medulla 
D)  increased production of atrial natriuretic factor 
E)  vagal stimulation

Question 5

Which of the following layers forms the bulk of the heart wall?

Accepted Answer

A)  epicardium 
B)  pericardium 
C)  endocardium 
D)  myocardium 
E)  visceral pericardium 
A)  epicardium 
B)  pericardium 
C)  endocardium 
D)  myocardium 
E)  visceral pericardium

Question 6

Chemoreceptors sensitive to blood oxygen levels are primarily located in the

Accepted Answer

A)  medulla oblongata. 
B)  carotid arteries. 
C)  right atrium. 
D)  left ventricle. 
E)  jugular veins. 
A)  medulla oblongata. 
B)  carotid arteries. 
C)  right atrium. 
D)  left ventricle. 
E)  jugular veins.

Question 7

During the ejection phase of the cardiac cycle, blood exits the left ventricle through the

Accepted Answer

A)  aorta. 
B)  coronary sinus. 
C)  pulmonary vein. 
D)  superior vena cava. 
E)  pulmonary trunk. 
A)  aorta. 
B)  coronary sinus. 
C)  pulmonary vein. 
D)  superior vena cava. 
E)  pulmonary trunk.

Question 8

The function of the pericardial fluid is to

Accepted Answer

A)  reduce friction between the pericardial membranes. 
B)  lubricate the heart valves. 
C)  replace any blood that is lost. 
D)  provide oxygen and nutrients to the endocardium. 
E)  stimulate the heart. 
A)  reduce friction between the pericardial membranes. 
B)  lubricate the heart valves. 
C)  replace any blood that is lost. 
D)  provide oxygen and nutrients to the endocardium. 
E)  stimulate the heart.

Question 9

Blood in the pulmonary veins returns to the

Accepted Answer

A)  right atrium. 
B)  left atrium. 
C)  right ventricle. 
D)  left ventricle. 
E)  coronary sinus. 
A)  right atrium. 
B)  left atrium. 
C)  right ventricle. 
D)  left ventricle. 
E)  coronary sinus.

Question 10

What is the foramen ovale?

Accepted Answer

A)  An opening between the right and left atria in the embryo and fetus. 
B)  An opening between the right and left ventricles in the embryo and fetus. 
C)  An oval hole in the pericardium in the embryo and fetus. 
D)  An opening between the pulmonary trunk and aorta in the embryo and fetus. 
A)  An opening between the right and left atria in the embryo and fetus. 
B)  An opening between the right and left ventricles in the embryo and fetus. 
C)  An oval hole in the pericardium in the embryo and fetus. 
D)  An opening between the pulmonary trunk and aorta in the embryo and fetus.

Question 11

Use the following two choices:
-$\downarrow$ blood pressure

Accepted Answer

A) ↑ heart rate 
B) ↓ heart rate 
A) ↑ heart rate 
B) ↓ heart rate

Question 12

The spontaneous opening of sodium channels marks the beginning of ____ of a myocardial cell.

Accepted Answer

A)  depolarization 
B)  repolarization 
C)  hyperpolarization 
D)  isopolarization 
E)  afterpolarization 
A)  depolarization 
B)  repolarization 
C)  hyperpolarization 
D)  isopolarization 
E)  afterpolarization

Question 13

Use the following key to mark the most correct answer.
-(1) rate of spontaneous generation of action potentials by the SA node;
(2) rate of spontaneous generation of action potentials by the AV node
A

Accepted Answer

A) Choose A if the first item is greater than the second item. 
B) Choose B if the first item is less than the second item. 
C) Choose C if the first item is equal or nearly equal to the second item. 
A) Choose A if the first item is greater than the second item. 
B) Choose B if the first item is less than the second item. 
C) Choose C if the first item is equal or nearly equal to the second item.

Question 14

A heart rate in excess of 100 BPM is called __________.

Accepted Answer

The answer of A heart rate in excess of 100...

Question 15

Lowered extracellular potassium levels will lower the heart rate because

Accepted Answer

A)  the resting membrane potential is hyperpolarized. 
B)  ectopic action potentials occur. 
C)  action potential amplitude declines. 
D)  more sodium channels open. 
E)  it blocks calcium channels. 
A)  the resting membrane potential is hyperpolarized. 
B)  ectopic action potentials occur. 
C)  action potential amplitude declines. 
D)  more sodium channels open. 
E)  it blocks calcium channels.

Question 16

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 17

The right atrium receives blood from

Accepted Answer

A)  the lungs and the heart. 
B)  the heart. 
C)  the body and the heart. 
D)  the lungs and the body. 
A)  the lungs and the heart. 
B)  the heart. 
C)  the body and the heart. 
D)  the lungs and the body.

Question 18

Fred was admitted to the cardiac unit with chest pains. No arrhythmias and no large changes in the heart rate were observable. Blood samples taken over the next few days showed no increase in enzymes such as creatine phosphokinase. A possible treatment of the condition is

Accepted Answer

A)  beta adrenergic blocking agents. 
B)  nitroglycerin. 
C)  calcium channel blocking agents. 
D)  aspirin. 
E)  exercise. 
A)  beta adrenergic blocking agents. 
B)  nitroglycerin. 
C)  calcium channel blocking agents. 
D)  aspirin. 
E)  exercise.

Question 19

-This chamber pumps blood to the pulmonary circuit.

Accepted Answer

The answer of  
-This chamber pumps blood to the...

Question 20

Match the blood vessel with the appropriate description.
-pulmonary trunk

Accepted Answer

A) returns blood to the heart from the lower extremities 
B) returns blood to the heart from the lungs 
C) carries blood from the left ventricle into systemic circulation 
D) returns blood to the heart from the head and neck 
E) carries blood from the right ventricle to the lungs 
A) returns blood to the heart from the lower extremities 
B) returns blood to the heart from the lungs 
C) carries blood from the left ventricle into systemic circulation 
D) returns blood to the heart from the head and neck 
E) carries blood from the right ventricle to the lungs

Exam 20: Cardiovascular System: the Heart

-Blood exits this chamber when it passes through the tricuspid valve.

-The figure illustrates the cardiac action potential. What does "C" represent?

Match the blood vessel with the appropriate description. -inferior vena cava

Which of the following factors would cause an increase in heart rate?

Which of the following layers forms the bulk of the heart wall?

Chemoreceptors sensitive to blood oxygen levels are primarily located in the

During the ejection phase of the cardiac cycle, blood exits the left ventricle through the

The function of the pericardial fluid is to

Blood in the pulmonary veins returns to the

What is the foramen ovale?

Use the following two choices: - ↓\downarrow↓ blood pressure

The spontaneous opening of sodium channels marks the beginning of ____ of a myocardial cell.

Use the following key to mark the most correct answer. -(1) rate of spontaneous generation of action potentials by the SA node; (2) rate of spontaneous generation of action potentials by the AV node A

A heart rate in excess of 100 BPM is called __________.

Lowered extracellular potassium levels will lower the heart rate because

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

The right atrium receives blood from

Fred was admitted to the cardiac unit with chest pains. No arrhythmias and no large changes in the heart rate were observable. Blood samples taken over the next few days showed no increase in enzymes such as creatine phosphokinase. A possible treatment of the condition is

-This chamber pumps blood to the pulmonary circuit.

Match the blood vessel with the appropriate description. -pulmonary trunk

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

Urinary System

Water, Electrolytes, and Acidbase Balance

Reproductive System

Development, Growth, Aging, and Genetics

Filters

Use the following two choices: - $\downarrow$ blood pressure