Question 1

Intercalated disks in cardiac muscle

Accepted Answer

A)  are a type of gap junction. 
B)  allow all of the muscle fibers in an area to contract at the same time. 
C)  prevent the cells from pulling apart. 
D)  reduce the electrical resistance between cells allowing APs to pass more easily from cell to cell. 
E)  All of these are correct. 
A)  are a type of gap junction. 
B)  allow all of the muscle fibers in an area to contract at the same time. 
C)  prevent the cells from pulling apart. 
D)  reduce the electrical resistance between cells allowing APs to pass more easily from cell to cell. 
E)  All of these are correct.

Question 2

The blood vessels that supply oxygenated blood to the heart tissue itself are the

Accepted Answer

A)  pulmonary veins. 
B)  coronary arteries. 
C)  coronary sinuses. 
D)  pulmonary trunks. 
E)  venae cavae. 
A)  pulmonary veins. 
B)  coronary arteries. 
C)  coronary sinuses. 
D)  pulmonary trunks. 
E)  venae cavae.

Question 3

In a normal heart, when the right ventricle contracts, it forces blood through the

Accepted Answer

A)  tricuspid valve. 
B)  bicuspid valve. 
C)  aortic semilunar valve. 
D)  pulmonary semilunar valve. 
A)  tricuspid valve. 
B)  bicuspid valve. 
C)  aortic semilunar valve. 
D)  pulmonary semilunar valve.

Question 4

The heart medication that causes a reduction in heart rate and strength of cardiac muscle contraction is (are)

Accepted Answer

A)  digitalis. 
B)  nitroglycerine. 
C)  beta-adrenergic blocking agents. 
D)  calcium channel blockers. 
E)  anticoagulants. 
A)  digitalis. 
B)  nitroglycerine. 
C)  beta-adrenergic blocking agents. 
D)  calcium channel blockers. 
E)  anticoagulants.

Question 5

Cardiac muscle cells

Accepted Answer

A)  twist when they contract 
B)  shorten when they contract 
C)  lengthen when they contract 
D)  contract by motor units 
E)  Both twist when they contract and shorten when they contract are correct. 
A)  twist when they contract 
B)  shorten when they contract 
C)  lengthen when they contract 
D)  contract by motor units 
E)  Both twist when they contract and shorten when they contract are correct.

Question 6

The pericardium, or pericardial sac

Accepted Answer

A)  is a double-layered, closed structure. 
B)  anchors the heart in the mediastinum. 
C)  has a tough fibrous connective tissue outer layer. 
D)  has an inner layer of squamous epithelial cells. 
E)  has all of these characteristics. 
A)  is a double-layered, closed structure. 
B)  anchors the heart in the mediastinum. 
C)  has a tough fibrous connective tissue outer layer. 
D)  has an inner layer of squamous epithelial cells. 
E)  has all of these characteristics.

Question 7

As the impulse from the SA node spreads across the atria, it is prevented from stimulating the ventricles

Accepted Answer

A)  SA node. 
B)  AV node. 
C)  tricuspid and bicuspid valves. 
D)  semilunar valves. 
E)  by the fibrous cardiac skeleton. 
A)  SA node. 
B)  AV node. 
C)  tricuspid and bicuspid valves. 
D)  semilunar valves. 
E)  by the fibrous cardiac skeleton.

Question 8

All of ventricular cells depolarizing and then repolarizing are shown as the ___________ on an EKG.

Accepted Answer

A)  P wave 
B)  P-Q (or P-R) interval 
C)  QRS complex 
D)  Q-T interval 
E)  T wave 
A)  P wave 
B)  P-Q (or P-R) interval 
C)  QRS complex 
D)  Q-T interval 
E)  T wave

Question 9

The serous pericardium just internal to the fibrous pericardium is called

Accepted Answer

A)  the visceral pericardium. 
B)  the epicardium. 
C)  the parietal pericardium. 
D)  the parietal pleura. 
E)  Either the visceral pericardium or the epicardium is equally correct for this structure. 
A)  the visceral pericardium. 
B)  the epicardium. 
C)  the parietal pericardium. 
D)  the parietal pleura. 
E)  Either the visceral pericardium or the epicardium is equally correct for this structure.

Question 10

The bicuspid (mitral) valve

Accepted Answer

A)  is the location of the pacemaker cells of a normal heart. 
B)  prevents blood flow from the right ventricle to the right atrium. 
C)  prevents blood flow from the left ventricle to the left atrium. 
D)  prevents blood flow from the pulmonary artery to the right ventricle. 
E)  prevents blood flow from the aorta to the left ventricle. 
A)  is the location of the pacemaker cells of a normal heart. 
B)  prevents blood flow from the right ventricle to the right atrium. 
C)  prevents blood flow from the left ventricle to the left atrium. 
D)  prevents blood flow from the pulmonary artery to the right ventricle. 
E)  prevents blood flow from the aorta to the left ventricle.

Question 11

Cardiac output is equal to

Accepted Answer

A)  the volume of blood pumped by either ventricle during one second. 
B)  the stroke volume times the number of beats per hour. 
C)  the volume of blood in the body times the number of beats per minute. 
D)  the stroke volume times the beats per minute. 
E)  the volume of blood in the body divided by the stroke volume. 
A)  the volume of blood pumped by either ventricle during one second. 
B)  the stroke volume times the number of beats per hour. 
C)  the volume of blood in the body times the number of beats per minute. 
D)  the stroke volume times the beats per minute. 
E)  the volume of blood in the body divided by the stroke volume.

Question 12

The following is a list of vessels and structures that are associated with the heart. 1) right atrium
2) left atrium
3) right ventricle
4) left ventricle
5) superior & inferior vena cava
6) aorta
7) pulmonary artery
8) pulmonary vein
9) mitrial/bicuspid valve
10) tricuspid valve
11) pulmonary semilunar valve
12) aorta semilunar valve
What is the correct order for the flow of blood entering the heart from the BODY and leaving for PULMONARY CIRCULATION?

Accepted Answer

A)  8, 1, 10, 3, 11, 7 
B)  5, 1, 10, 3, 11, 7 
C)  5, 2, 9, 4, 12, 6 
D)  6, 12, 1, 2, 10, 4 
E)  8, 2, 3, 7, 11, 6 
A)  8, 1, 10, 3, 11, 7 
B)  5, 1, 10, 3, 11, 7 
C)  5, 2, 9, 4, 12, 6 
D)  6, 12, 1, 2, 10, 4 
E)  8, 2, 3, 7, 11, 6

Question 13

Repolarization of the ventricles is shown as the ___________ on an EKG.

Accepted Answer

A)  P wave 
B)  P-Q (or P-R) interval 
C)  QRS complex 
D)  Q-T interval 
E)  T wave 
A)  P wave 
B)  P-Q (or P-R) interval 
C)  QRS complex 
D)  Q-T interval 
E)  T wave

Question 14

All of the following occur as the cardiovascular system ages EXCEPT:

Accepted Answer

A)  decrease in cardiac output 
B)  hypertrophy of the left ventricle 
C)  increased afterload 
D)  decreased elasticity of heart and aorta 
E)  increase in the overall resting heart rate 
A)  decrease in cardiac output 
B)  hypertrophy of the left ventricle 
C)  increased afterload 
D)  decreased elasticity of heart and aorta 
E)  increase in the overall resting heart rate

Question 15

Melinda suffers from stenosis of the aortic semilunar valve. This will increase the rigidity of the valve making it hard to open. This increases the ________________ therefore ________________ the cardiac output.

Accepted Answer

A)  afterload; decreasing 
B)  afterload; increasing 
C)  preload; decreasing 
D)  preload; increasing 
E)  venous return; decreasing 
A)  afterload; decreasing 
B)  afterload; increasing 
C)  preload; decreasing 
D)  preload; increasing 
E)  venous return; decreasing

Question 16

When ventricular pressure exceeds atrial pressure, the

Accepted Answer

A)  ejection occurs. 
B)  atria pump blood into the ventricles. 
C)  ventricle is in diastole. 
D)  blood is pumped into the atrium. 
E)  AV valves close. 
A)  ejection occurs. 
B)  atria pump blood into the ventricles. 
C)  ventricle is in diastole. 
D)  blood is pumped into the atrium. 
E)  AV valves close.

Question 17

If the SA node is unable to function

Accepted Answer

A)  an ectopic beat may be initiated by another part of the heart. 
B)  the heart rate will be slower. 
C)  the AV node will become the pacemaker for the heart. 
D)  All of these are possible. 
E)  None of these would occur. 
A)  an ectopic beat may be initiated by another part of the heart. 
B)  the heart rate will be slower. 
C)  the AV node will become the pacemaker for the heart. 
D)  All of these are possible. 
E)  None of these would occur.

Question 18

Which of these statements concerning the form and location of the heart are correct?

Accepted Answer

A)  The apex is the most superior part of the heart. 
B)  The apex is directed to the left, and deep to the fifth intercostal space. 
C)  The base of the heart is directed inferior and slightly posterior. 
D)  The most superior part of the heart is deep to the 12th intercostal space. 
E)  Both the apex is the most superior part of the heart and the base of the heart is directed inferior and slightly posterior are correct. 
A)  The apex is the most superior part of the heart. 
B)  The apex is directed to the left, and deep to the fifth intercostal space. 
C)  The base of the heart is directed inferior and slightly posterior. 
D)  The most superior part of the heart is deep to the 12th intercostal space. 
E)  Both the apex is the most superior part of the heart and the base of the heart is directed inferior and slightly posterior are correct.

Question 19

Action potentials in contractile cardiac muscle cells

Accepted Answer

A)  are much faster than action potentials in skeletal muscle. 
B)  have no plateau phase. 
C)  involve voltage-gated calcium ion channels. 
D)  have sodium ion channels that open and cause repolarization. 
E)  have all of these characteristics. 
A)  are much faster than action potentials in skeletal muscle. 
B)  have no plateau phase. 
C)  involve voltage-gated calcium ion channels. 
D)  have sodium ion channels that open and cause repolarization. 
E)  have all of these characteristics.

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

Intercalated disks in cardiac muscle

The blood vessels that supply oxygenated blood to the heart tissue itself are the

In a normal heart, when the right ventricle contracts, it forces blood through the

The heart medication that causes a reduction in heart rate and strength of cardiac muscle contraction is (are)

Cardiac muscle cells

The pericardium, or pericardial sac

As the impulse from the SA node spreads across the atria, it is prevented from stimulating the ventricles

All of ventricular cells depolarizing and then repolarizing are shown as the ___________ on an EKG.

The serous pericardium just internal to the fibrous pericardium is called

The bicuspid (mitral) valve

Cardiac output is equal to

Repolarization of the ventricles is shown as the ___________ on an EKG.

All of the following occur as the cardiovascular system ages EXCEPT:

Melinda suffers from stenosis of the aortic semilunar valve. This will increase the rigidity of the valve making it hard to open. This increases the therefore the cardiac output.

When ventricular pressure exceeds atrial pressure, the

If the SA node is unable to function

Which of these statements concerning the form and location of the heart are correct?

Action potentials in contractile cardiac muscle cells

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

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Exam 12: Heart

Intercalated disks in cardiac muscle

The blood vessels that supply oxygenated blood to the heart tissue itself are the

In a normal heart, when the right ventricle contracts, it forces blood through the

The heart medication that causes a reduction in heart rate and strength of cardiac muscle contraction is (are)

Cardiac muscle cells

The pericardium, or pericardial sac

As the impulse from the SA node spreads across the atria, it is prevented from stimulating the ventricles

All of ventricular cells depolarizing and then repolarizing are shown as the ___________ on an EKG.

The serous pericardium just internal to the fibrous pericardium is called

The bicuspid (mitral) valve

Cardiac output is equal to

Repolarization of the ventricles is shown as the ___________ on an EKG.

All of the following occur as the cardiovascular system ages EXCEPT:

Melinda suffers from stenosis of the aortic semilunar valve. This will increase the rigidity of the valve making it hard to open. This increases the ________________ therefore ________________ the cardiac output.

When ventricular pressure exceeds atrial pressure, the

If the SA node is unable to function

Which of these statements concerning the form and location of the heart are correct?

Action potentials in contractile cardiac muscle cells

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 Structures and Their Functions

Tissuesasis of Life

Integumentary System

Skeletal System: Bones and Joints

Muscular System

Nervous System

Senses

Endocrine System

Blood

Blood Vessels and Circulation

The Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition, Metabolism, and Body Temperature Regulation

Urinary System and Fluid Balance

Reproductive System

Development, Heredity, and Aging

Filters

Melinda suffers from stenosis of the aortic semilunar valve. This will increase the rigidity of the valve making it hard to open. This increases the therefore the cardiac output.