Question 1

Given an end diastolic volume (EDV) of 120 ml / beat and an end systolic volume (ESV) of 50 ml / beat, the stroke volume (SV) would be ___________.

Accepted Answer

A)  50 ml / beat 
B)  170 ml / beat 
C)  70 ml / beat 
D)  120 ml / beat 
A)  50 ml / beat 
B)  170 ml / beat 
C)  70 ml / beat 
D)  120 ml / beat

Question 2

Which coronary artery is most responsible for supplying blood to the myocardial tissue of the left atrium?

Accepted Answer

A)  anterior interventricular artery 
B)  posterior interventricular artery 
C)  circumflex artery 
D)  right marginal artery 
A)  anterior interventricular artery 
B)  posterior interventricular artery 
C)  circumflex artery 
D)  right marginal artery

Question 3

When released in large quantities, thyroxine, a thyroid gland hormone, causes a sustained increase in heart rate.

Accepted Answer

A) True 
 B)False

Question 4

During the isovolumetric relaxation phase of the cardiac cycle__________, .

Accepted Answer

A)  atrioventricular valves are closed; aortic and pulmonary valves are open 
B)  atrioventricular, aortic, and pulmonary valves are open 
C)  atrioventricular, aortic, and pulmonary valves are closed 
D)  atrioventricular valves are open; aortic and pulmonary valves are closed 
A)  atrioventricular valves are closed; aortic and pulmonary valves are open 
B)  atrioventricular, aortic, and pulmonary valves are open 
C)  atrioventricular, aortic, and pulmonary valves are closed 
D)  atrioventricular valves are open; aortic and pulmonary valves are closed

Question 5

The heart is called a "double pump" because there are two functionally separate circulations. Trace the pathway of each of these circulations and include the following information: heart chambers involved, major blood vessels involved, and general areas through which the blood flows. Begin with the right atrium.

Accepted Answer

Right atrium to right ventricle to pulmo

Question 6

List the three vessels that bring oxygen-poor blood to the right atrium. Which regions of the body do they serve?

Accepted Answer

The superior vena cava returns oxygen-po

Question 7

If the mitral valve is unable to close properly, __________.

Accepted Answer

A)  blood could flow back into the right atrium 
B)  blood could flow back into the left atrium 
C)  blood could flow back into the left ventricle 
D)  blood could flow back into the right ventricle 
A)  blood could flow back into the right atrium 
B)  blood could flow back into the left atrium 
C)  blood could flow back into the left ventricle 
D)  blood could flow back into the right ventricle

Question 8

Which vessel(s) of the heart receive(s) blood from the right ventricle?

Accepted Answer

A)  venae cavae 
B)  pulmonary trunk 
C)  pulmonary veins 
D)  aorta 
A)  venae cavae 
B)  pulmonary trunk 
C)  pulmonary veins 
D)  aorta

Question 9

Autonomic regulation of heart rate is via two reflex centers found in the pons.

Accepted Answer

A) True 
 B)False

Question 10

Compared to skeletal muscle, cardiac muscle __________.

Accepted Answer

A)  has more nuclei per cell 
B)  cells are larger than skeletal muscle cells 
C)  lacks striations 
D)  has gap junctions that allow it to act as a functional syncytium 
A)  has more nuclei per cell 
B)  cells are larger than skeletal muscle cells 
C)  lacks striations 
D)  has gap junctions that allow it to act as a functional syncytium

Question 11

The condition where fluid compresses the heart and limits its ability to contract is called__________ .

Accepted Answer

A)  cardiac tamponade 
B)  myocardial infarction 
C)  pericarditis 
D)  angina pectoris 
A)  cardiac tamponade 
B)  myocardial infarction 
C)  pericarditis 
D)  angina pectoris

Question 12

Heart tissue is supplied with nutrients primarily by diffusion from the heart chambers through the myocardium.

Accepted Answer

A) True 
 B)False

Question 13

Asystole is the total absence of ventricular electrical activity. Explain why defibrillation would not be effective in this situation.

Accepted Answer

Defibrillation is accomplished by electr

Question 14

Normal heart sounds are caused by which of the following events?

Accepted Answer

A)  friction of blood against the chamber walls 
B)  opening of the heart valves 
C)  excitation of the sinoatrial (S
A)  node 
D)  closure of the heart valves 
A)  friction of blood against the chamber walls 
B)  opening of the heart valves 
C)  excitation of the sinoatrial (S
A)  node 
D)  closure of the heart valves

Question 15

The "lub" sounds of the heart are valuable in diagnosis because they provide information about the function of the heart's pulmonary and aortic semilunar valves.

Accepted Answer

A) True 
 B)False

Question 16

Select the correct statement about the function of myocardial cells.

Accepted Answer

A)  The influx of potassium ions from extracellular sources is the initiating event in cardiac muscle contraction. 
B)  The refractory period in skeletal muscle is much longer than that in cardiac muscle. 
C)  The entire heart contracts as a unit or it does not contract at all. 
D)  Cardiac muscle cells are innervated by sympathetic, parasympathetic, and somatic nerve fibers so that the nervous system can increase heart rate. 
A)  The influx of potassium ions from extracellular sources is the initiating event in cardiac muscle contraction. 
B)  The refractory period in skeletal muscle is much longer than that in cardiac muscle. 
C)  The entire heart contracts as a unit or it does not contract at all. 
D)  Cardiac muscle cells are innervated by sympathetic, parasympathetic, and somatic nerve fibers so that the nervous system can increase heart rate.

Question 17

The fact that the left ventricle of the heart is thicker than the right ventricle reveals that it__________ .

Accepted Answer

A)  pumps a greater volume of blood 
B)  pumps blood against a greater resistance 
C)  sends blood through a smaller valve 
D)  expands the thoracic cage 
A)  pumps a greater volume of blood 
B)  pumps blood against a greater resistance 
C)  sends blood through a smaller valve 
D)  expands the thoracic cage

Question 18

If the aorta and pulmonary trunk were switched, oxygen rich blood would be pumped from the left ventricle to the lungs.

Accepted Answer

A) True 
 B)False

Question 19

Hemorrhage with a large loss of blood causes ___________.

Accepted Answer

A)  no change in blood pressure but a change in respiration 
B)  a rise in blood pressure due to change in cardiac output 
C)  a lowering of blood pressure due to change in cardiac output 
D)  no change in blood pressure but a slower heart rate 
A)  no change in blood pressure but a change in respiration 
B)  a rise in blood pressure due to change in cardiac output 
C)  a lowering of blood pressure due to change in cardiac output 
D)  no change in blood pressure but a slower heart rate

Question 20

The papillary muscles contract after the other ventricular muscles so that they can take up the slack on the chordae tendineae before the full force of ventricular contractions sends blood against the atrioventricular (AV) valve flaps.

Accepted Answer

A) True 
 B)False

Given an end diastolic volume (EDV) of 120 ml / beat and an end systolic volume (ESV) of 50 ml / beat, the stroke volume (SV) would be ___________.

Which coronary artery is most responsible for supplying blood to the myocardial tissue of the left atrium?

When released in large quantities, thyroxine, a thyroid gland hormone, causes a sustained increase in heart rate.

During the isovolumetric relaxation phase of the cardiac cycle__________, .

List the three vessels that bring oxygen-poor blood to the right atrium. Which regions of the body do they serve?

If the mitral valve is unable to close properly, __________.

Which vessel(s) of the heart receive(s) blood from the right ventricle?

Autonomic regulation of heart rate is via two reflex centers found in the pons.

Compared to skeletal muscle, cardiac muscle __________.

The condition where fluid compresses the heart and limits its ability to contract is called__________ .

Heart tissue is supplied with nutrients primarily by diffusion from the heart chambers through the myocardium.

Asystole is the total absence of ventricular electrical activity. Explain why defibrillation would not be effective in this situation.

Normal heart sounds are caused by which of the following events?

The "lub" sounds of the heart are valuable in diagnosis because they provide information about the function of the heart's pulmonary and aortic semilunar valves.

Select the correct statement about the function of myocardial cells.

The fact that the left ventricle of the heart is thicker than the right ventricle reveals that it__________ .

If the aorta and pulmonary trunk were switched, oxygen rich blood would be pumped from the left ventricle to the lungs.

Hemorrhage with a large loss of blood causes ___________.

The papillary muscles contract after the other ventricular muscles so that they can take up the slack on the chordae tendineae before the full force of ventricular contractions sends blood against the atrioventricular (AV) valve flaps.

The Human Body: an Orientation

Chemistry Comes Alive

Cells: the Living Units

Tissue: the Living Fabric

The Integumentary System

Bones and Skeletal Tissues

The Skeleton

Joints

Muscles and Muscle Tissue

The Muscular System

Fundamentals of the Nervous System and Nervous Tissue

The Central Nervous System

The Peripheral Nervous System and Reflex Activity

The Autonomic Nervous System

The Special Senses

The Endocrine System

Blood

The Cardiovascular System: Blood Vessels

The Lymphatic System and Lymphoid Organs and Tissues

Filters

Exam 18: The Cardiovascular System: the Heart

Given an end diastolic volume (EDV) of 120 ml / beat and an end systolic volume (ESV) of 50 ml / beat, the stroke volume (SV) would be ___________.

Which coronary artery is most responsible for supplying blood to the myocardial tissue of the left atrium?

When released in large quantities, thyroxine, a thyroid gland hormone, causes a sustained increase in heart rate.

During the isovolumetric relaxation phase of the cardiac cycle__________, .

List the three vessels that bring oxygen-poor blood to the right atrium. Which regions of the body do they serve?

If the mitral valve is unable to close properly, __________.

Which vessel(s) of the heart receive(s) blood from the right ventricle?

Autonomic regulation of heart rate is via two reflex centers found in the pons.

Compared to skeletal muscle, cardiac muscle __________.

The condition where fluid compresses the heart and limits its ability to contract is called__________ .

Heart tissue is supplied with nutrients primarily by diffusion from the heart chambers through the myocardium.

Asystole is the total absence of ventricular electrical activity. Explain why defibrillation would not be effective in this situation.

Normal heart sounds are caused by which of the following events?

The "lub" sounds of the heart are valuable in diagnosis because they provide information about the function of the heart's pulmonary and aortic semilunar valves.

Select the correct statement about the function of myocardial cells.

The fact that the left ventricle of the heart is thicker than the right ventricle reveals that it__________ .

If the aorta and pulmonary trunk were switched, oxygen rich blood would be pumped from the left ventricle to the lungs.

Hemorrhage with a large loss of blood causes ___________.

The papillary muscles contract after the other ventricular muscles so that they can take up the slack on the chordae tendineae before the full force of ventricular contractions sends blood against the atrioventricular (AV) valve flaps.

The Human Body: an Orientation

Chemistry Comes Alive

Cells: the Living Units

Tissue: the Living Fabric

The Integumentary System

Bones and Skeletal Tissues

The Skeleton

Joints

Muscles and Muscle Tissue

The Muscular System

Fundamentals of the Nervous System and Nervous Tissue

The Central Nervous System

The Peripheral Nervous System and Reflex Activity

The Autonomic Nervous System

The Special Senses

The Endocrine System

Blood

The Cardiovascular System: Blood Vessels

The Lymphatic System and Lymphoid Organs and Tissues

Filters