Question 1

Figure 18.1Using Figure 18.1, match the following:
-AV bundle.

Accepted Answer

The answer of   Figure 18.1Using Figure 18.1, match...

Question 2

Anastomoses among coronary arterial branches provide collateral routes for blood delivery to the heart muscle.

Accepted Answer

A) True 
 B)False

Question 3

A 55- year- old male was admitted to the hospital with heart failure. He complains of increasing shortness of breath on exertion and needing to sleep on three pillows at night. On physical assessment, the nurse determines that his ankles and feet are very swollen. Which of these symptoms reflect left- sided heart failure and which reflect right- sided heart failure?

Accepted Answer

Because the heart is a double pump, each

Question 4

A patient takes a nitroglycerin tablet sublingually for chest pain. Nitroglycerin acts directly on smooth muscle, producing relaxation and vessel dilation. How would this relieve chest pain?

Accepted Answer

Angina pectoris is thoracic pain caused

Question 5

Figure 18.3Using Figure 18.3, match the following:
-The ECG wave interval represents ventricular repolarization.

Accepted Answer

The answer of   Figure 18.3Using Figure 18.3, match...

Question 6

Define the terms end diastolic volume (EDV) and end systolic volume (ESV) and relate them to the calculation of stroke volume.

Accepted Answer

EDV is the amount of blood tha

Question 7

A Doppler ultrasound was performed on an infant who had symptoms of breathlessness and it was found that he had a patent ductus arteriosus. Discuss the location and function of the ductus arteriosus in the fetus and relate it to the reason for the infant's breathlessness.

Accepted Answer

The ductus arteriosus is a shunt between

Question 8

Chronic release of excess thyroxine can cause a sustained increase in heart rate and a weakened heart.

Accepted Answer

A) True 
 B)False

Question 9

Define systole and diastole. Which heart chambers are usually referenced when these terms are used?

Accepted Answer

Systole is contraction of the

Question 10

A patient is prescribed a calcium channel blocker to prevent angina (chest pain), by decreasing the demand for oxygen. Explain why.

Accepted Answer

By preventing the influx of calcium ions

Question 11

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

Question 12

The left ventricular wall of the heart is thicker than the right wall in order to .

Accepted Answer

A)  pump blood with greater pressure 
B)  pump blood through a smaller valve 
C)  expand the thoracic cage during diastole 
D)  accommodate a greater volume of blood 
A)  pump blood with greater pressure 
B)  pump blood through a smaller valve 
C)  expand the thoracic cage during diastole 
D)  accommodate a greater volume of blood

Question 13

When viewing a dissected heart, it is easy to visually discern the right and left ventricles by
)

Accepted Answer

A)  finding the papillary muscles 
B)  tracing out where the auricles connect 
C)  noticing the thickness of the ventricle walls 
D)  locating the apex 
A)  finding the papillary muscles 
B)  tracing out where the auricles connect 
C)  noticing the thickness of the ventricle walls 
D)  locating the apex

Question 14

Select the correct statement about the heart valves.

Accepted Answer

A)  The mitral valve separates the right atrium from the right ventricle. 
B)  The AV valves are supported by chordae tendineae so that regurgitation of blood into the atria during ventricular contraction does not occur. 
C)  The tricuspid valve divides the left atrium from the left ventricle. 
D)  Aortic and pulmonary valves control the flow of blood into the heart. 
A)  The mitral valve separates the right atrium from the right ventricle. 
B)  The AV valves are supported by chordae tendineae so that regurgitation of blood into the atria during ventricular contraction does not occur. 
C)  The tricuspid valve divides the left atrium from the left ventricle. 
D)  Aortic and pulmonary valves control the flow of blood into the heart.

Question 15

Which of the events below does not occur when the semilunar valves are open?

Accepted Answer

A)  Ventricles are in diastole. 
B)  Ventricles are in systole. 
C)  Blood enters pulmonary arteries and the aorta. 
D)  AV valves are closed. 
A)  Ventricles are in diastole. 
B)  Ventricles are in systole. 
C)  Blood enters pulmonary arteries and the aorta. 
D)  AV valves are closed.

Question 16

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

Accepted Answer

A) True 
 B)False

Question 17

Select the correct statement about cardiac output.

Accepted Answer

A)  If a semilunar valve were partially obstructed, the end systolic volume in the affected ventricle would be decreased. 
B)  Stroke volume increases if end diastolic volume decreases. 
C)  A slow heart rate increases end diastolic volume, stroke volume, and force of contraction. 
D)  Decreased venous return will result in increased end diastolic volume. 
A)  If a semilunar valve were partially obstructed, the end systolic volume in the affected ventricle would be decreased. 
B)  Stroke volume increases if end diastolic volume decreases. 
C)  A slow heart rate increases end diastolic volume, stroke volume, and force of contraction. 
D)  Decreased venous return will result in increased end diastolic volume.

Question 18

Congestive heart failure means that the pumping efficiency of the heart is depressed so that there is inadequate delivery of blood to body tissues.

Accepted Answer

A) True 
 B)False

Question 19

A patient was admitted to the hospital with chest pains. On admission, his pulse was 110 and blood pressure was 96/64. According to his history, his normal pulse rate is usually between 80 and 88 and his blood pressure runs from 120/70 to 130/80. Explain why these changes in BP and HR occur.

Accepted Answer

Increased heart rate (measured by taking

Question 20

Figure 18.1Using Figure 18.1, match the following:
-SA node.

Accepted Answer

The answer of   Figure 18.1Using Figure 18.1, match...

Exam 18: The Cardiovascular System: the Heart

Figure 18.1Using Figure 18.1, match the following: -AV bundle.

Anastomoses among coronary arterial branches provide collateral routes for blood delivery to the heart muscle.

A patient takes a nitroglycerin tablet sublingually for chest pain. Nitroglycerin acts directly on smooth muscle, producing relaxation and vessel dilation. How would this relieve chest pain?

Figure 18.3Using Figure 18.3, match the following: -The ECG wave interval represents ventricular repolarization.

Define the terms end diastolic volume (EDV) and end systolic volume (ESV) and relate them to the calculation of stroke volume.

A Doppler ultrasound was performed on an infant who had symptoms of breathlessness and it was found that he had a patent ductus arteriosus. Discuss the location and function of the ductus arteriosus in the fetus and relate it to the reason for the infant's breathlessness.

Chronic release of excess thyroxine can cause a sustained increase in heart rate and a weakened heart.

Define systole and diastole. Which heart chambers are usually referenced when these terms are used?

A patient is prescribed a calcium channel blocker to prevent angina (chest pain), by decreasing the demand for oxygen. Explain why.

Select the correct statement about the function of myocardial cells.

The left ventricular wall of the heart is thicker than the right wall in order to .

When viewing a dissected heart, it is easy to visually discern the right and left ventricles by )

Select the correct statement about the heart valves.

Which of the events below does not occur when the semilunar valves are open?

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

Select the correct statement about cardiac output.

Congestive heart failure means that the pumping efficiency of the heart is depressed so that there is inadequate delivery of blood to body tissues.

A patient was admitted to the hospital with chest pains. On admission, his pulse was 110 and blood pressure was 96/64. According to his history, his normal pulse rate is usually between 80 and 88 and his blood pressure runs from 120/70 to 130/80. Explain why these changes in BP and HR occur.

Figure 18.1Using Figure 18.1, match the following: -SA node.

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

The Immune System: Innate and Adaptive Body Defensives

The Respiratory System

The Digestive System

Nutrition, Metabolism, and Body Temperature Regulation

The Urinary System

Fluid, Electrolyte, and Acid-Base Balance

The Reproductive System

Pregnancy and Human Development

Heredity

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