Question 1

The primary function of the venae cavae includes which of the following?

Accepted Answer

A)  return blood to the right atrium 
B)  pump oxygenated blood into circulation 
C)  remove excess fluid from the heart chambers 
D)  anchor the heart to surrounding structures 
E)  prevent expansion of the heart 
A)  return blood to the right atrium 
B)  pump oxygenated blood into circulation 
C)  remove excess fluid from the heart chambers 
D)  anchor the heart to surrounding structures 
E)  prevent expansion of the heart

Question 2

Figure 12-1 Major Internal Landmarks of the Heart
Use Figure 12-1 to identify the labeled part.
-Label E represents the

Accepted Answer

A)  pulmonary veins. 
B)  pulmonary trunk. 
C)  pulmonary arteries. 
D)  superior vena cava. 
E)  inferior vena cava. 
A)  pulmonary veins. 
B)  pulmonary trunk. 
C)  pulmonary arteries. 
D)  superior vena cava. 
E)  inferior vena cava.

Question 3

Which structural feature of cardiac muscle cells enables action potentials to travel rapidly from cell to cell?

Accepted Answer

A)  mitochondria 
B)  desmosomes 
C)  gap junctions 
D)  myofibrils 
E)  myoglobin 
A)  mitochondria 
B)  desmosomes 
C)  gap junctions 
D)  myofibrils 
E)  myoglobin

Question 4

Which of the following is greatest during left ventricular systole?

Accepted Answer

A)  the pressure in the ventricle 
B)  the pressure in the aorta 
C)  the pressure in the left atrium 
D)  the pressure in the arteries 
E)  the pressure in the right atrium 
A)  the pressure in the ventricle 
B)  the pressure in the aorta 
C)  the pressure in the left atrium 
D)  the pressure in the arteries 
E)  the pressure in the right atrium

Question 5

Explain the significance of the thickness of the left ventricular wall.

Accepted Answer

The thicker wall of the left ventricle a

Question 6

Figure 12-1 Major Internal Landmarks of the Heart
Use Figure 12-1 to identify the labeled part.
-Label A represents the

Accepted Answer

A)  aortic arch. 
B)  pulmonary trunk. 
C)  pulmonary arteries. 
D)  superior vena cava. 
E)  inferior vena cava. 
A)  aortic arch. 
B)  pulmonary trunk. 
C)  pulmonary arteries. 
D)  superior vena cava. 
E)  inferior vena cava.

Question 7

Which of the following indicates the start of the systemic circuit?

Accepted Answer

A)  pulmonary trunk 
B)  pulmonary arteries 
C)  vena cavae 
D)  ascending aorta 
E)  cardiac veins 
A)  pulmonary trunk 
B)  pulmonary arteries 
C)  vena cavae 
D)  ascending aorta 
E)  cardiac veins

Question 8

The amount of blood ejected by a ventricle during a single beat is called the

Accepted Answer

A)  heart rate. 
B)  stroke volume. 
C)  cardiac output. 
D)  end diastolic volume. 
E)  end systolic volume. 
A)  heart rate. 
B)  stroke volume. 
C)  cardiac output. 
D)  end diastolic volume. 
E)  end systolic volume.

Question 9

The following are various components of the conducting system of the heart: 
1) Purkinje cells
2) AV bundle
3) AV node
4) SA node
5) bundle branches
The sequence in which an action potential would move through this system is

Accepted Answer

A)  1, 4, 3, 2, 5. 
B)  3, 2, 4, 5, 1. 
C)  3, 5, 4, 2, 1. 
D)  4, 3, 2, 5, 1. 
E)  4, 2, 3, 5, 1. 
A)  1, 4, 3, 2, 5. 
B)  3, 2, 4, 5, 1. 
C)  3, 5, 4, 2, 1. 
D)  4, 3, 2, 5, 1. 
E)  4, 2, 3, 5, 1.

Question 10

Malfunctioning chordae tendineae would

Accepted Answer

A)  allow blood to flow back into the aorta and the pulmonary trunk. 
B)  inhibit closure of the semilunar valves. 
C)  cause regurgitation into the atria. 
D)  enable the cusps of the AV valves to swing into the ventricles. 
E)  block blood flow into coronary arteries. 
A)  allow blood to flow back into the aorta and the pulmonary trunk. 
B)  inhibit closure of the semilunar valves. 
C)  cause regurgitation into the atria. 
D)  enable the cusps of the AV valves to swing into the ventricles. 
E)  block blood flow into coronary arteries.

Question 11

The cardiac pacemaker cells are located in which of the following?

Accepted Answer

A)  Purkinje fibers 
B)  SA node 
C)  AV node 
D)  bundle branches 
E)  bundle of His 
A)  Purkinje fibers 
B)  SA node 
C)  AV node 
D)  bundle branches 
E)  bundle of His

Question 12

The right ventricle pumps blood to the

Accepted Answer

A)  left atrium. 
B)  left ventricle. 
C)  lungs. 
D)  systemic circuit. 
E)  right atrium. 
A)  left atrium. 
B)  left ventricle. 
C)  lungs. 
D)  systemic circuit. 
E)  right atrium.

Question 13

Blood from the viscera and the lower limbs is conducted to the heart through which vessel?

Accepted Answer

A)  coronary sinus 
B)  inferior vena cava 
C)  pulmonary veins 
D)  superior vena cava 
E)  cardiac vein 
A)  coronary sinus 
B)  inferior vena cava 
C)  pulmonary veins 
D)  superior vena cava 
E)  cardiac vein

Question 14

The skeleton of the heart consists of

Accepted Answer

A)  a reticular connective tissue within the myocardium. 
B)  a bone in the interatrial septum. 
C)  a bone in the interventricular septum. 
D)  dense bands of tough, elastic connective tissue. 
E)  fibrous connective tissue in the auricle of the atrium. 
A)  a reticular connective tissue within the myocardium. 
B)  a bone in the interatrial septum. 
C)  a bone in the interventricular septum. 
D)  dense bands of tough, elastic connective tissue. 
E)  fibrous connective tissue in the auricle of the atrium.

Question 15

During rapid depolarization of a ventricular contractile cell, the voltage-gated sodium channels close when the membrane potential reaches approximately

Accepted Answer

A)  -90 mV. 
B)  -30 mV. 
C)  0 mV. 
D)  +30 mV. 
E)  +90 mV. 
A)  -90 mV. 
B)  -30 mV. 
C)  0 mV. 
D)  +30 mV. 
E)  +90 mV.

Question 16

The interventricular septum receives blood from the

Accepted Answer

A)  marginal artery. 
B)  right coronary artery. 
C)  coronary sinus. 
D)  left coronary artery. 
E)  circumflex artery. 
A)  marginal artery. 
B)  right coronary artery. 
C)  coronary sinus. 
D)  left coronary artery. 
E)  circumflex artery.

Question 17

The maximum rate of contraction in normal cardiac muscle fibers is approximately ________ per minute.

Accepted Answer

A)  80 
B)  140 
C)  200 
D)  250 
E)  300+ 
A)  80 
B)  140 
C)  200 
D)  250 
E)  300+

Question 18

Which of the following most likely occurs in the condition called hyperkalemia?

Accepted Answer

A)  decreased heart rate 
B)  increased rate of depolarization at the SA node 
C)  irregular cardiac contractions 
D)  fluid collection in the pericardial sac 
E)  elevated calcium concentrations 
A)  decreased heart rate 
B)  increased rate of depolarization at the SA node 
C)  irregular cardiac contractions 
D)  fluid collection in the pericardial sac 
E)  elevated calcium concentrations

Question 19

When a chamber fills with blood and is preparing to begin the next cardiac cycle, that chamber is

Accepted Answer

A)  in systole. 
B)  in arrhythmia. 
C)  contracting. 
D)  depolarizing. 
E)  in diastole. 
A)  in systole. 
B)  in arrhythmia. 
C)  contracting. 
D)  depolarizing. 
E)  in diastole.

Question 20

________ permit the exchange of nutrients, dissolved gases, and waste products between the blood and surrounding tissues.

Accepted Answer

A)  Veins 
B)  Arteries 
C)  Arterial trunks 
D)  Capillaries 
E)  Vena cavae 
A)  Veins 
B)  Arteries 
C)  Arterial trunks 
D)  Capillaries 
E)  Vena cavae

The primary function of the venae cavae includes which of the following?

Figure 12-1 Major Internal Landmarks of the Heart Use Figure 12-1 to identify the labeled part. -Label E represents the

Which structural feature of cardiac muscle cells enables action potentials to travel rapidly from cell to cell?

Which of the following is greatest during left ventricular systole?

Explain the significance of the thickness of the left ventricular wall.

Figure 12-1 Major Internal Landmarks of the Heart Use Figure 12-1 to identify the labeled part. -Label A represents the

Which of the following indicates the start of the systemic circuit?

The amount of blood ejected by a ventricle during a single beat is called the

The following are various components of the conducting system of the heart: 1) Purkinje cells 2) AV bundle 3) AV node 4) SA node 5) bundle branches The sequence in which an action potential would move through this system is

Malfunctioning chordae tendineae would

The cardiac pacemaker cells are located in which of the following?

The right ventricle pumps blood to the

Blood from the viscera and the lower limbs is conducted to the heart through which vessel?

The skeleton of the heart consists of

During rapid depolarization of a ventricular contractile cell, the voltage-gated sodium channels close when the membrane potential reaches approximately

The interventricular septum receives blood from the

The maximum rate of contraction in normal cardiac muscle fibers is approximately ________ per minute.

Which of the following most likely occurs in the condition called hyperkalemia?

When a chamber fills with blood and is preparing to begin the next cardiac cycle, that chamber is

________ permit the exchange of nutrients, dissolved gases, and waste products between the blood and surrounding tissues.

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

Cell Structure and Function

The Tissue Level of Organization

The Integumentary System

The Skeletal System

The Muscular System

The Nervous System

The General and Special Senses

The Endocrine System

The Cardiovascular System: Blood

The Cardiovascular System: Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

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Exam 12: The Cardiovascular System: the Heart

The primary function of the venae cavae includes which of the following?

Figure 12-1 Major Internal Landmarks of the Heart Use Figure 12-1 to identify the labeled part. -Label E represents the

Which structural feature of cardiac muscle cells enables action potentials to travel rapidly from cell to cell?

Which of the following is greatest during left ventricular systole?

Explain the significance of the thickness of the left ventricular wall.

Figure 12-1 Major Internal Landmarks of the Heart Use Figure 12-1 to identify the labeled part. -Label A represents the

Which of the following indicates the start of the systemic circuit?

The amount of blood ejected by a ventricle during a single beat is called the

The following are various components of the conducting system of the heart: 1) Purkinje cells 2) AV bundle 3) AV node 4) SA node 5) bundle branches The sequence in which an action potential would move through this system is

Malfunctioning chordae tendineae would

The cardiac pacemaker cells are located in which of the following?

The right ventricle pumps blood to the

Blood from the viscera and the lower limbs is conducted to the heart through which vessel?

The skeleton of the heart consists of

During rapid depolarization of a ventricular contractile cell, the voltage-gated sodium channels close when the membrane potential reaches approximately

The interventricular septum receives blood from the

The maximum rate of contraction in normal cardiac muscle fibers is approximately ________ per minute.

Which of the following most likely occurs in the condition called hyperkalemia?

When a chamber fills with blood and is preparing to begin the next cardiac cycle, that chamber is

________ permit the exchange of nutrients, dissolved gases, and waste products between the blood and surrounding tissues.

An Introduction to Anatomy and Physiology

The Chemical Level of Organization

Cell Structure and Function

The Tissue Level of Organization

The Integumentary System

The Skeletal System

The Muscular System

The Nervous System

The General and Special Senses

The Endocrine System

The Cardiovascular System: Blood

The Cardiovascular System: Blood Vessels and Circulation

The Lymphatic System and Immunity

The Respiratory System

The Digestive System

Metabolism and Energetics

The Urinary System

The Reproductive System

Development and Inheritance

Filters