Question 1

In-Text Figure Based Questions
-What is considered a "normal" cardiac output when resting? Please provide units. (Figure 20-24)

Accepted Answer

A)  1-2 L/min 
B)  2-5 L/min 
C)  5-7.5 L/min 
D)  10-12.5 L/min 
E)  20-25 L/min 
A)  1-2 L/min 
B)  2-5 L/min 
C)  5-7.5 L/min 
D)  10-12.5 L/min 
E)  20-25 L/min

Question 2

In cardiac muscle,

Accepted Answer

A)  calcium ions are not released from the sarcoplasmic reticulum. 
B)  calcium ions do not bind to troponin molecules. 
C)  calcium ions play no role in the process of contraction. 
D)  about 20 percent of the calcium ion required for contraction comes from outside the cell. 
E)  calcium ions play an important role in repolarizing the membrane after the depolarization phase. 
A)  calcium ions are not released from the sarcoplasmic reticulum. 
B)  calcium ions do not bind to troponin molecules. 
C)  calcium ions play no role in the process of contraction. 
D)  about 20 percent of the calcium ion required for contraction comes from outside the cell. 
E)  calcium ions play an important role in repolarizing the membrane after the depolarization phase.

Question 3

Positive inotropic drugs such as glucagon and thyroid hormone cause

Accepted Answer

A)  decreased heart rate. 
B)  increased heart rate. 
C)  increased contractility. 
D)  decreased contractility. 
E)  asystole. 
A)  decreased heart rate. 
B)  increased heart rate. 
C)  increased contractility. 
D)  decreased contractility. 
E)  asystole.

Question 4

Blood is supplied to the muscular wall of the left atrium by the

Accepted Answer

A)  brachiocephalic artery. 
B)  right coronary artery. 
C)  left coronary artery. 
D)  phrenic arteries. 
E)  pulmonary arteries. 
A)  brachiocephalic artery. 
B)  right coronary artery. 
C)  left coronary artery. 
D)  phrenic arteries. 
E)  pulmonary arteries.

Question 5

The normal pacemaker of the heart is located in

Accepted Answer

A)  the Purkinje fibers. 
B)  the sinoatrial node. 
C)  the atrioventricular node. 
D)  the wall of the left ventricle. 
E)  both the left and right ventricles. 
A)  the Purkinje fibers. 
B)  the sinoatrial node. 
C)  the atrioventricular node. 
D)  the wall of the left ventricle. 
E)  both the left and right ventricles.

Question 6

Collectively, the conducting cells that carry the impulse from the SA node to the AV node is known as the

Accepted Answer

A)  conducting system. 
B)  AV block. 
C)  internodal pathway. 
D)  bundle branches. 
E)  pacemaker cells. 
A)  conducting system. 
B)  AV block. 
C)  internodal pathway. 
D)  bundle branches. 
E)  pacemaker cells.

Question 7

Which of the following would cause stroke volume to increase?

Accepted Answer

A)  when venous return is decreased 
B)  when ventricular contraction is reduced 
C)  drugs that stimulate beta-1 receptors 
D)  decrease in heart rate 
E)  decreased sympathetic stimulation 
A)  when venous return is decreased 
B)  when ventricular contraction is reduced 
C)  drugs that stimulate beta-1 receptors 
D)  decrease in heart rate 
E)  decreased sympathetic stimulation

Question 8

The inferior point of the heart is called the

Accepted Answer

A)  apex. 
B)  hilum. 
C)  base. 
D)  septum. 
E)  mediastinum. 
A)  apex. 
B)  hilum. 
C)  base. 
D)  septum. 
E)  mediastinum.

Question 9

Tetanic muscle contractions don't occur in a normal cardiac muscle because

Accepted Answer

A)  cardiac muscle tissue contracts on its own. 
B)  neural stimulation is lacking. 
C)  the refractory period lasts until the muscle relaxes. 
D)  the refractory period ends before the muscle reaches peak tension. 
E)  potassium channels outnumber sodium channels. 
A)  cardiac muscle tissue contracts on its own. 
B)  neural stimulation is lacking. 
C)  the refractory period lasts until the muscle relaxes. 
D)  the refractory period ends before the muscle reaches peak tension. 
E)  potassium channels outnumber sodium channels.

Question 10

The ________ is a remnant of an important fetal blood vessel that once linked the pulmonary and systemiccircuits.

Accepted Answer

A)  fossa ovalis 
B)  ductus arteriosus 
C)  foramen ovale 
D)  ductus venosus 
E)  ligamentum arteriosum 
A)  fossa ovalis 
B)  ductus arteriosus 
C)  foramen ovale 
D)  ductus venosus 
E)  ligamentum arteriosum

Question 11

The coronary sinus drains the ________ into the ________.

Accepted Answer

A)  coronary arteries; left ventricle 
B)  cardiac veins; right atrium 
C)  interventricular artery; left ventricle 
D)  right atrium; right ventricle 
E)  cardiac vein; right ventricle 
A)  coronary arteries; left ventricle 
B)  cardiac veins; right atrium 
C)  interventricular artery; left ventricle 
D)  right atrium; right ventricle 
E)  cardiac vein; right ventricle

Question 12

Cardiac output can be increased by all of the following except

Accepted Answer

A)  decreasing ejection fraction. 
B)  decreasing end systolic volume. 
C)  increasing stroke volume. 
D)  increasing ejection fraction. 
E)  increasing heart rate. 
A)  decreasing ejection fraction. 
B)  decreasing end systolic volume. 
C)  increasing stroke volume. 
D)  increasing ejection fraction. 
E)  increasing heart rate.

Question 13

Figure 20-1 The Heart
  
Use Figure 20-1 to answer the following questions:
-Identify the structure labeled "22."

Accepted Answer

A)  pulmonary trunk 
B)  aortic arch 
C)  pulmonary veins 
D)  superior vena cava 
E)  carotid artery 
A)  pulmonary trunk 
B)  aortic arch 
C)  pulmonary veins 
D)  superior vena cava 
E)  carotid artery

Question 14

A patient has an end-diastolic volume of 125 ml. A heart attack has weakened her left ventricle so it canpump a stroke volume of only 40 ml. Calculate her end-systolic volume.

Accepted Answer

A)  85 ml 
B)  3.1 ml 
C)  5000 ml 
D)  165 ml 
E)  There is not enough data given to calculate the end-systolic volume. 
A)  85 ml 
B)  3.1 ml 
C)  5000 ml 
D)  165 ml 
E)  There is not enough data given to calculate the end-systolic volume.

Question 15

Which of the following would not increase heart rate?

Accepted Answer

A)  increased sympathetic stimulation of SA node 
B)  decreased parasympathetic stimulation of nodal fibers 
C)  increased levels of epinephrine 
D)  faster depolarization of the pacemaker potential 
E)  beta blocking drugs 
A)  increased sympathetic stimulation of SA node 
B)  decreased parasympathetic stimulation of nodal fibers 
C)  increased levels of epinephrine 
D)  faster depolarization of the pacemaker potential 
E)  beta blocking drugs

Question 16

Analysis of the electrocardiogram can reveal all of the following except

Accepted Answer

A)  heart rate. 
B)  stroke volume. 
C)  the condition of the conducting system. 
D)  the effects of drugs and poisons. 
E)  the duration of the ventricular action potential. 
A)  heart rate. 
B)  stroke volume. 
C)  the condition of the conducting system. 
D)  the effects of drugs and poisons. 
E)  the duration of the ventricular action potential.

Question 17

Figure 20-1 The Heart
  
Use Figure 20-1 to answer the following questions:
-Identify the structure labeled "19."

Accepted Answer

A)  tricuspid valve 
B)  pulmonary semilunar valve 
C)  aortic semilunar valve 
D)  bicuspid valve 
E)  ligamentum arteriosum 
A)  tricuspid valve 
B)  pulmonary semilunar valve 
C)  aortic semilunar valve 
D)  bicuspid valve 
E)  ligamentum arteriosum

Question 18

Which chamber has the thickest wall?

Accepted Answer

A)  left atrium 
B)  right atrium 
C)  left ventricle 
D)  right ventricle 
E)  left auricle 
A)  left atrium 
B)  right atrium 
C)  left ventricle 
D)  right ventricle 
E)  left auricle

Question 19

The ________ is the volume of blood in a ventricle at the beginning of systole.

Accepted Answer

A)  ejection fraction 
B)  end-diastole volume 
C)  asystolic volume 
D)  end-systolic volume 
E)  stroke volume 
A)  ejection fraction 
B)  end-diastole volume 
C)  asystolic volume 
D)  end-systolic volume 
E)  stroke volume

Question 20

Which of the following is occurring during ventricular diastole?

Accepted Answer

A)  The ventricles are passively filling. 
B)  The ventricles are passively filling and atria are contracting. 
C)  The AV valves are closed. 
D)  The SL valves are open. 
E)  Ventricular ejection. 
A)  The ventricles are passively filling. 
B)  The ventricles are passively filling and atria are contracting. 
C)  The AV valves are closed. 
D)  The SL valves are open. 
E)  Ventricular ejection.

Exam 20: The Heart

In-Text Figure Based Questions -What is considered a "normal" cardiac output when resting? Please provide units. (Figure 20-24)

In cardiac muscle,

Positive inotropic drugs such as glucagon and thyroid hormone cause

Blood is supplied to the muscular wall of the left atrium by the

The normal pacemaker of the heart is located in

Collectively, the conducting cells that carry the impulse from the SA node to the AV node is known as the

Which of the following would cause stroke volume to increase?

The inferior point of the heart is called the

Tetanic muscle contractions don't occur in a normal cardiac muscle because

The ________ is a remnant of an important fetal blood vessel that once linked the pulmonary and systemiccircuits.

The coronary sinus drains the ________ into the ________.

Cardiac output can be increased by all of the following except

Figure 20-1 The Heart Use Figure 20-1 to answer the following questions: -Identify the structure labeled "22."

A patient has an end-diastolic volume of 125 ml. A heart attack has weakened her left ventricle so it canpump a stroke volume of only 40 ml. Calculate her end-systolic volume.

Which of the following would not increase heart rate?

Analysis of the electrocardiogram can reveal all of the following except

Figure 20-1 The Heart Use Figure 20-1 to answer the following questions: -Identify the structure labeled "19."

Which chamber has the thickest wall?

The ________ is the volume of blood in a ventricle at the beginning of systole.

Which of the following is occurring during ventricular diastole?

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

The Cellular Level of Organization

The Tissue Level of Organization

The Integumentary System

Bones and Bone Structure

The Axial Skeleton

The Appendicular Skeleton

Joints

Muscle Tissue

The Muscular System

Nervous Tissue

The Spinal Cord, Spinal Nerves, and Spinal Reflexes

The Brain and Cranial Nerves

Sensory Pathways and the Somatic Nervous System

The Autonomic Nervous System and Higher-Order Functions

The Special Senses

The Endocrine System

Blood

Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism, Nutrition, and Energetics

The Urinary System

Fluid, Electrolyte, and Acid-Base Balance

The Reproductive System

Development and Inheritance

Filters

The coronary sinus drains the into the .